A KO2‑Based Solid Superoxide Reservoir for Irreversible Capacity Compensation in Superoxide-Based Na–O2 Batteries
Cuiyi Deng, Yu Zhong, Lei Qin, Yiying Wu · 2026
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Description
Deng, Zhong, Qin, and Wu tackle a fading problem in sodium-oxygen batteries in this 2026 study. These batteries promise cheap, high-capacity storage, but side reactions steadily consume their active superoxide, a reactive oxygen compound, so each recharge recovers less capacity than the last. The team added a solid reservoir of potassium superoxide, a commercial chemical, to replace what is lost.
Tests and spectroscopy showed the reservoir did two jobs. It directly supplied extra superoxide to cover early losses. It also helped the battery form its own sodium superoxide more effectively. Cells built this way averaged a Coulombic efficiency of 98.5 percent, meaning nearly all charge put in came back out during discharge. They also kept cycling for more than 600 rounds, far longer than untreated versions.
Catalog record
| CREATOR | Cuiyi Deng, Yu Zhong, Lei Qin, Yiying Wu |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 27 KB |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |