2020
DOI: 10.1002/adma.202001419
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High‐Efficiency Cathode Sodium Compensation for Sodium‐Ion Batteries

Abstract: Sodium‐ion batteries have gained much attention for their potential application in large‐scale stationary energy storage due to the low cost and abundant sodium sources in the earth. However, the electrochemical performance of sodium‐ion full cells (SIFCs) suffers severely from the irreversible consumption of sodium ions of cathode during the solid electrolyte interphase (SEI) formation of hard carbon anode. Here, a high‐efficiency cathode sodiation compensation reagent, sodium oxalate (Na2C2O4), which possess… Show more

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Cited by 132 publications
(102 citation statements)
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“…It is worth noting that although we have suppressed the P2-O2 phase transition to achieve high capacity and long cycle life, the relatively low sodium content in the P2 cathode materials in general could still be a limiting factor for their commercial applications in sodium-ion batteries. Sodium supplementation through additives, pre-sodiated and metallic negative electrodes 50 , 51 can be solutions to this issue.…”
Section: Resultsmentioning
confidence: 99%
“…It is worth noting that although we have suppressed the P2-O2 phase transition to achieve high capacity and long cycle life, the relatively low sodium content in the P2 cathode materials in general could still be a limiting factor for their commercial applications in sodium-ion batteries. Sodium supplementation through additives, pre-sodiated and metallic negative electrodes 50 , 51 can be solutions to this issue.…”
Section: Resultsmentioning
confidence: 99%
“…Nevertheless, the high decomposition potential of Na 2 C 2 O 4 seriously hinders the irreversible output capacity, accordingly causing the dosage-abuse issue. Moreover, exorbitant activation potential may lead to the break-down of electrolyte on the cathode side and potential unsafe reactions, resulting in poor electrochemical performance, thereby impairing the practical application of SICs [ 34 , 35 ].…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3][4][5] The reported sodium batteries are mainly based on liquid electrolytes with ammable organic solvents, such as esters and ethers, which inevitably bring about leakage, volatilization, and subsequent safety issues. 6,7 In contrast, all-solidstate electrolytes show the advantages of no leakage, good stability, and high safety. [8][9][10][11][12][13][14] The reported all-solid-state electrolytes for sodium batteries can be roughly categorized into two types, organic polymer and inorganic electrolytes.…”
Section: Introductionmentioning
confidence: 99%