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Toward High-Safety Potassium-Sulfur Batteries Using a Potassium Polysulfide Catholyte and Metal-Free Anode

Title
Toward High-Safety Potassium-Sulfur Batteries Using a Potassium Polysulfide Catholyte and Metal-Free Anode
Author
황장연
Keywords
ELECTROLYTE
Issue Date
2018-03
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v. 3, no. 3, page. 540-541
Abstract
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.
URI
https://pubs.acs.org/doi/10.1021/acsenergylett.8b00037https://repository.hanyang.ac.kr/handle/20.500.11754/117952
ISSN
2380-8195
DOI
10.1021/acsenergylett.8b00037
Appears in Collections:
CENTER FOR CREATIVE CONVERGENCE EDUCATION[S](창의융합교육원) > ETC
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