Stalling oxygen evolution in high-voltage cathodes by lanthurization

被引:177
作者
Cai, Mingzhi [1 ]
Dong, Yanhao [2 ,3 ]
Xie, Miao [4 ]
Dong, Wujie [4 ]
Dong, Chenlong [5 ]
Dai, Peng [6 ,7 ,8 ]
Zhang, Hui [9 ]
Wang, Xin [10 ]
Sun, Xuzhou [4 ]
Zhang, Shaoning [4 ]
Yoon, Moonsu [2 ]
Xu, Haowei [2 ]
Ge, Yunsong [1 ]
Li, Ju [2 ,11 ]
Huang, Fuqiang [1 ,4 ]
机构
[1] Peking Univ, Coll Chem & Mol Engn, Beijing, Peoples R China
[2] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA
[3] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
[4] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai, Peoples R China
[5] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin, Peoples R China
[6] Xiamen Univ, Coll Chem & Chem Engn, Xiamen, Peoples R China
[7] Xiamen Univ, Coll Energy, Xiamen, Peoples R China
[8] Xiamen Univ, Sch Energy Res, Xiamen, Peoples R China
[9] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai, Peoples R China
[10] Zhengzhou Univ, Coll Chem, Zhengzhou, Peoples R China
[11] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
基金
中国国家自然科学基金;
关键词
HIGH-CAPACITY; LICOO2; ORIGIN;
D O I
10.1038/s41560-022-01179-3
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Coatings and surface passivation are sought to protect high-energy-density cathodes in lithium-ion batteries, which suffer from labile oxygen loss and fast degradations. Here we develop the theory underlying the high-voltage-induced oxygen evolution crisis and report a lanthurizing process to regulate the near-surface structure of energy materials beyond conventional surface doping. Using LiCoO2 as an example and generalizing to Co-lean/free high-energy-density layered cathodes, we demonstrate effective surface passivation, suppressed surface degradation and improved electrochemical performance. High-voltage cycling stability has been greatly enhanced, up to 4.8 V versus Li+/Li, including in practical pouch-type full cells. The superior performance is rooted in the engineered surface architecture and the reliability of the synthesis method. The designed surface phase stalls oxygen evolution reaction at high voltages. It illustrates processing opportunities for surface engineering and coating by high-oxygen-activity passivation, selective chemical alloying and strain engineering using wet chemistry.
引用
收藏
页码:159 / +
页数:13
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