phenomenon · claim-type · cross-domain-transfer · mechanism · claim-relation · replication-status · limitation — grounded in the full text| phenomenon | ion migration in aqueous electrolyte, safe and cheap, and short of the voltage and energy density the application needs— “Research interests and achievements in ABs have surged globally in the past 5 years. However, their large-scale application is plagued by the limited output voltage and inadequate energy density.” | |
| claim-type | method— “Depending on the nature of migration ions, ABs can be classified into two types: metal-ion ABs and non–metal-ion ABs. So far, a variety of metal-ion ABs, such as Li+, Na+, K+, Zn2+, Mg2+, Ca2+, and Al3+, have been demonstrated on the basis of metal-ion intercalation chemistry.” | |
| method — evidence | — “Depending on the nature of migration ions, ABs can be classified into two types: metal-ion ABs and non–metal-ion ABs. So far, a variety of metal-ion ABs, such as Li+, Na+, K+, Zn2+, Mg2+, Ca2+, and Al3+, have been demonstrated on the basis of metal-ion intercalation chemistry.” | |
| object of study — evidence | — “Safety concerns about organic media-based batteries are the key public arguments against their widespread usage. Aqueous batteries (ABs), based on water which is environmentally benign, provide a promising alternative for safe, cost-effective, and scalable energy storage, with high power density and tolerance against mishandling.” | |
| research question — evidence | — “Research interests and achievements in ABs have surged globally in the past 5 years. However, their large-scale application is plagued by the limited output voltage and inadequate energy density.” | |
| contribution — evidence | — “Safety concerns about organic media-based batteries are the key public arguments against their widespread usage. Aqueous batteries (ABs), based on water which is environmentally benign, provide a promising alternative for safe, cost-effective, and scalable energy storage, with high power density and tolerance against mishandling.” | |
| mechanism | the ionic radius sets which compounds can host the ion: Na+ (0.95 A) and K+ (1.33 A) are much larger than Li+ (0.60 A), which NARROWS THE SELECTION CRITERION to a few compounds capable of de/intercalation in aqueous media— “However, the radii of Na+ (0.95 Å) and K+ (1.33 Å) are much larger than those of Li+ (0.60 Å) ( Fig. 2A), so the selection criterion was specialized to only a few compounds, showing capability of Na+ or K+ deintercalation/intercalation in aqueous media.” | mechanisms[0] |
| mechanism | the HYDRATED radius runs the other way - solvated K+ is smaller, so the electrolyte conducts better and the rate capability is higher for K+ than for Li+ or Na+— “Because of the smaller hydrated radius of solvated K+ (3.31 Å), KAB-based electrolyte exhibits much higher ionic conductivity, which enables higher rate capability in K+ storage than in Li+ and Na+” | mechanisms[1] |
| critiques | organic-media lithium-ion batteries, on safety grounds, with dated incidents - Boeing 787 in 2013, Samsung Note 7 in 2016, Tesla Model S in 2019— “Incidents in recent years include Boeing 787 battery fires in 2013, Samsung Note 7 explosions in 2016, and the Tesla Model S combustions in 2019. These have caused serious threats to human health or life, which remind us continuously that safety is a prerequisite for batteries” | claim_relations[0] |
| critiques | lithium-based grid storage, on the scarcity of Li at 20 parts per million and its rising cost— “The scarce abundance (20 parts per million) and increasing high cost of Li (or Co) pose challenges for using them for grid storage.” | claim_relations[1] |
| sense | aqueous battery - AS USED HERE: a battery whose electrolyte is water, classified by WHICH ION MIGRATES rather than by anything about its chemistry in the abstract. The defining property is the one the measurement observes, which is why this paper hedges its taxonomy nowhere— “Depending on the nature of migration ions, ABs can be classified into two types: metal-ion ABs and non–metal-ion ABs. So far, a variety of metal-ion ABs, such as Li+, Na+, K+, Zn2+, Mg2+, Ca2+, and Al3+, have been demonstrated on the basis of metal-ion intercalation chemistry.” | senses[0] |
| sense | `WISE` / `salt-in-water electrolyte` - A NAME PAIR BUILT BY INVERSION, AND THE OLDER MEMBER IS THE ONE THAT HAD TO BE COINED. `The salt-in-water electrolyte refers to traditional aqueous electrolyte.` The dilute case needed no name until the concentrated case existed; the paper defines it purely by pointing back at the thing it already was.— “water-in-salt electrolyte (WISE) or hydrate-melt electrolytes. The salt-in-water electrolyte refers to traditional aqueous electrolyte.” | senses[1] |
| control | the proposed systems are compared against the incumbents that actually hold the market - LIBs, Ni/MH and lead-acid - rather than against each other — held— “At present, lead-acid ABs are the most recognizable aqueous-based batteries in our daily life and still hold a major proportion of the global battery market.” — rules out a new chemistry looking good against other new chemistries while losing to the battery already in the product— “Currently, LIBs, Ni/MH, and lead-acid batteries remain as the mainstream energy storage systems in the world market of rechargeable batteries. LIBs have been the ubiquitous commercial power source for portable electronics, electric vehicles, and backup power supplies as evidenced by their widespread usage in the past decades.” | controls[0] |
| control | laboratory areal capacity is stated against the INDUSTRIAL-LEVEL figure rather than against other laboratory results — failed— “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_). Therefore, further developments of Ni-based and Co-based materials for Ni-Zn or Co-Zn batteries, which simultaneously have high gravimetric capacity, high rate capability, and long life with high mass loading, remain difficult to achieve.” — rules out a record capacity that is a record only among research cells— “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_). Therefore, further developments of Ni-based and Co-based materials for Ni-Zn or Co-Zn batteries, which simultaneously have high gravimetric capacity, high rate capability, and long life with high mass loading, remain difficult to achieve.” | controls[1] |
| weight | organic-media lithium-ion batteries, on safety grounds, with dated incidents - Boeing 787 in 2013, Samsung Note 7 in 2016, Tesla Model S in 2019 — 0.9— “Incidents in recent years include Boeing 787 battery fires in 2013, Samsung Note 7 explosions in 2016, and the Tesla Model S combustions in 2019. These have caused serious threats to human health or life, which remind us continuously that safety is a prerequisite for batteries” | claim_relations[0] |
| weight | lithium-based grid storage, on the scarcity of Li at 20 parts per million and its rising cost — 0.85— “The scarce abundance (20 parts per million) and increasing high cost of Li (or Co) pose challenges for using them for grid storage.” | claim_relations[1] |
| note | WISE —contrasted-with→ salt-in-water electrolyte — The contrast is the whole content of the name: the two differ only in which component is in excess.— “water-in-salt electrolyte (WISE) or hydrate-melt electrolytes. The salt-in-water electrolyte refers to traditional aqueous electrolyte.” | concept_edges[0] |
| note | Grotthuss proton conduction —distinct-from→ conduction of metal ions — Stated flatly - 'highly varying from' - not hedged, so weight 1.0.— “The motion process is highly varying from the conduction of metal ions where solvated metal ions diffuse at long distance individually. As a consequence, the battery based on the so-called Grotthuss proton conduction exhibited excellent rate performance” | concept_edges[1] |
| audit | Grotthuss proton conduction —causes→ proton batteries — Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but it 'is suggested' that Grotthuss topochemistry is key to the rate performance OF proton batteries; hedged, and the endpoint is loose.— “It is suggested that the diffusion-free Grotthuss topochemistry is the key to this superior rate performance of proton batteries.” | concept_edges[2] |
| note | Grotthuss proton conduction —causes→ proton batteries — 'It is suggested that' - the paper hedges the attribution, so weight 0.7 records the paper's own caution, not mine.— “It is suggested that the diffusion-free Grotthuss topochemistry is the key to this superior rate performance of proton batteries.” | concept_edges[2] |
| weight | Grotthuss proton conduction —causes→ proton batteries — 0.7— “It is suggested that the diffusion-free Grotthuss topochemistry is the key to this superior rate performance of proton batteries.” | concept_edges[2] |
| note | electrochemical stability window —causes→ operating voltage — 'would suppress' - asserted, but modally, hence 0.9 rather than 1.0.— “The narrow electrochemical stability window (ESW) of water would suppress the operating voltage” | concept_edges[3] |
| weight | electrochemical stability window —causes→ operating voltage — 0.9— “The narrow electrochemical stability window (ESW) of water would suppress the operating voltage” | concept_edges[3] |
| outcome | control — held— “Currently, LIBs, Ni/MH, and lead-acid batteries remain as the mainstream energy storage systems in the world market of rechargeable batteries. LIBs have been the ubiquitous commercial power source for portable electronics, electric vehicles, and backup power supplies as evidenced by their widespread usage in the past decades.”— “At present, lead-acid ABs are the most recognizable aqueous-based batteries in our daily life and still hold a major proportion of the global battery market.” | controls[0] |
| outcome | control — failed— “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_). Therefore, further developments of Ni-based and Co-based materials for Ni-Zn or Co-Zn batteries, which simultaneously have high gravimetric capacity, high rate capability, and long life with high mass loading, remain difficult to achieve.” | controls[1] |
| limitation | THE LABORATORY-TO-INDUSTRY GAP IS STATED WITH A NUMBER: materials that would need high gravimetric capacity, high rate capability and long life AT HIGH MASS LOADING simultaneously remain difficult to achieve, against an industrial-level areal capacity of about 35 mAh/cm2— “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_). Therefore, further developments of Ni-based and Co-based materials for Ni-Zn or Co-Zn batteries, which simultaneously have high gravimetric capacity, high rate capability, and long life with high mass loading, remain difficult to achieve.” | limitations[0] |
| limitation | large-scale application is plagued by limited output voltage and inadequate energy density - the two properties the safety argument is traded against— “Research interests and achievements in ABs have surged globally in the past 5 years. However, their large-scale application is plagued by the limited output voltage and inadequate energy density.” | limitations[1] |
| limitation | an explosive growth of publications in five years, with limitations that STILL should be overcome - the paper's own framing of its field's output— “We have witnessed an explosive growth of publications regarding advanced ABs especially in the recent 5 years, but there are still some limitations that should be overcome.” | limitations[2] |
| limitation | energy density, power density and long-standing stability all have to be pushed further before the requirements of practical applications are met— “Although significant advances have been made in this area, unremitting efforts are still required, including pushing the energy/power densities and long-standing stability before meeting the requirements of practical applications.” | limitations[3] |
finding · quantity · variable · definition · key-term — grounded in the full text| finding | — “Depending on the nature of migration ions, ABs can be classified into two types: metal-ion ABs and non–metal-ion ABs. So far, a variety of metal-ion ABs, such as Li+, Na+, K+, Zn2+, Mg2+, Ca2+, and Al3+, have been demonstrated on the basis of metal-ion intercalation chemistry.” | content_tags.findings[0] |
| finding | — “Because of the smaller hydrated radius of solvated K+ (3.31 Å), KAB-based electrolyte exhibits much higher ionic conductivity, which enables higher rate capability in K+ storage than in Li+ and Na+” | content_tags.findings[1] |
| finding | — “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_). Therefore, further developments of Ni-based and Co-based materials for Ni-Zn or Co-Zn batteries, which simultaneously have high gravimetric capacity, high rate capability, and long life with high mass loading, remain difficult to achieve.” | content_tags.findings[2] |
| finding | — “At present, lead-acid ABs are the most recognizable aqueous-based batteries in our daily life and still hold a major proportion of the global battery market.” | content_tags.findings[3] |
| quantity | mAh/cm2 - the industrial-level areal capacity laboratory results fall far below— “which is much lower than the industrial-level areal capacity of ∼35 mAh cm−2 ( _79_).… | content_tags.quantities[0] |
| quantity | parts per million - the crustal abundance of lithium, given as the reason it cannot carry grid storage | content_tags.quantities[1] |
| quantity | angstroms - the bare ionic radii of Li+, Na+ and K+, which set which compounds can host them | content_tags.quantities[2] |
| variable | mass loading | content_tags.variables[0] |
| variable | migration ions Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | content_tags.variables[1] |
| definition | Aqueous batteries Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | content_tags.definitions[0] |
| definition | metal-ion ABs Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | content_tags.definitions[2] |
| definition | non-metal-ion ABs Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | content_tags.definitions[3] |
| concept | Aqueous batteries — not defined in this paper's own words; water-electrolyte storage, offered as the safe and cheap alternative to organic-media cells and short of them on voltage and energy density Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[0] |
| concept | metal-ion ABs — not defined in this paper's own words; one of the two types, by migrating ion - Li+, Na+, K+, Zn2+, Mg2+, Ca2+, Al3+ - on intercalation chemistry Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[1] |
| concept | areal capacity — not defined in this paper's own words; capacity per unit electrode area, and the measure on which the laboratory-industry gap is stated - about 35 mAh/cm2 at industrial level Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[2] |
| concept | mass loading — not defined in this paper's own words; how much active material sits on the electrode - the condition under which the other three properties have to hold simultaneously, and do not Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[3] |
| concept | WISE — not defined in this paper's own words; water-in-salt electrolyte - the concentrated-salt regime, named by INVERTING the ordinary name for the dilute one, so the pair reads as a ratio rather than as two unrelated materials Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[4] |
| concept | salt-in-water electrolyte — not defined in this paper's own words; the traditional dilute aqueous electrolyte, RETROSPECTIVELY renamed by inversion once WISE existed - the paper defines it only by saying which older thing it refers to Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[5] |
| concept | Grotthuss proton conduction — not defined in this paper's own words; long-range proton transport by correlated local displacement rather than by a carrier travelling the distance; the paper calls it diffusion-free and likens it to Newton's cradle Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[6] |
| concept | conduction of metal ions — not defined in this paper's own words; the vehicular alternative Grotthuss is contrasted against - solvated ions each individually traversing the whole distance Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[7] |
| concept | electrochemical stability window — not defined in this paper's own words; the voltage span within which water is not split; the paper treats its narrowness as the cause of the ceiling on aqueous-battery energy density Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[8] |
| concept | proton batteries — not defined in this paper's own words; batteries whose charge carrier is the proton itself rather than a metal ion Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[9] |
| concept | operating voltage — not defined in this paper's own words; the usable voltage of the cell, which the paper treats as bounded by water's stability window Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | concepts[10] |
| capacity | Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher. | content_tags.statistics[0] |
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