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

被引：104
作者：
Hwang, Jang-Yeon [1 ]
Kim, Hee Min [1 ]
Yoon, Chong S. [2 ]
Sun, Yang-Kook [1 ]
机构：
[1] Hanyang Univ, Dept Energy Engn, Seoul 04763, South Korea
[2] Hanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
来源：
ACS ENERGY LETTERS | 2018年 / 3卷 / 03期
关键词：
ELECTROLYTE;
D O I：
10.1021/acsenergylett.8b00037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
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收藏
页码：540 / 541
页数：3
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