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Enhanced Electrochemical Performance of Aprotic Li‐CO 2 Batteries with a Ruthenium‐Complex‐Based Mobile Catalyst
Author(s) -
Zhang Zhen,
Bai WenLong,
Cai ZhiPeng,
Cheng JinHuan,
Kuang HuaYi,
Dong BoXu,
Wang YuBo,
Wang KaiXue,
Chen JieSheng
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202105892
Subject(s) - electrochemistry , catalysis , ruthenium , polarization (electrochemistry) , materials science , amorphous solid , electrochemical energy conversion , electrode , chemical engineering , chemistry , inorganic chemistry , organic chemistry , engineering
Li‐CO 2 batteries are regarded as next‐generation high‐energy‐density electrochemical devices. However, the greatest challenge arises from the formation of the discharge product, Li 2 CO 3 , which would accumulate and deactivate heterogenous catalysts to cause huge polarization. Herein, Ru(bpy) 3 Cl 2 was employed as a solution‐phase catalyst for Li‐CO 2 batteries and proved to be the most effective one screened so far. Spectroscopy and electrochemical analyses elucidate that the Ru II center could interact with both CO 2 and amorphous Li 2 C 2 O 4 intermediate, thus promoting electroreduction process and delaying carbonate transformation. As a result, the charge potential is reduced to 3.86 V and over 60 discharge/charge cycles are achieved with a fixed capacity of 1000 mAh g −1 at a current density of 300 mA g −1 . Our work provides a new avenue to improve the electrochemical performance of Li‐CO 2 batteries with efficient mobile catalysts.