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Toward High-Safety Potassium-Sulfur Batteries Using a Potassium Polysulfide Catholyte and Metal-Free Anode
- Hwang, Jang-Yeon;
- Kim, Hee Min;
- Yoon, Chong Seung;
- Sun, Yang Kook
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120초록
Based on the reversible conversion reactions, K2Sx (S <= x <= 6) ->(discharge) K2S3 ->(charge) K2S5, discharge charge the proposed K-S battery delivered a high discharge capacity of similar to 400 mAh g(-1) at 0.1 C -rate with stable cycle retention (94% after 20 cycles) and good rate capability up to 2 C -rate. In addition, instead of an explosive and highly reactive potassium metal electrode, a full cell consisting of an electrochemically potassium -impregnated hard carbon and the K2Sx (5 <= x <= 6) catholyte was constructed to demonstrate the feasibility of a safe K S battery system free of metallic potassium.
키워드
ELECTROLYTE
- 제목
- Toward High-Safety Potassium-Sulfur Batteries Using a Potassium Polysulfide Catholyte and Metal-Free Anode
- 저자
- Hwang, Jang-Yeon; Kim, Hee Min; Yoon, Chong Seung; Sun, Yang Kook
- 발행일
- 2018-03
- 유형
- 정기학술지(Article(Perspective Article포함))
- 저널명
- ACS ENERGY LETTERS
- 권
- 3
- 호
- 3
- 페이지
- 540 ~ 541