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000893036 1001_ $$0P:(DE-Juel1)161485$$aWang, Rui$$b0
000893036 245__ $$aTwin boundary defect engineering improves lithium-ion diffusion for fast-charging spinel cathode materials
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000893036 520__ $$aDefect engineering on electrode materials is considered an effective approach to improve the electrochemical performance of batteries since the presence of a variety of defects with different dimensions may promote ion diffusion and provide extra storage sites. However, manipulating defects and obtaining an in-depth understanding of their role in electrode materials remain challenging. Here, we deliberately introduce a considerable number of twin boundaries into spinel cathodes by adjusting the synthesis conditions. Through high-resolution scanning transmission electron microscopy and neutron diffraction, the detailed structures of the twin boundary defects are clarified, and the formation of twin boundary defects is attributed to agminated lithium atoms occupying the Mn sites around the twin boundary. In combination with electrochemical experiments and first-principles calculations, we demonstrate that the presence of twin boundaries in the spinel cathode enables fast lithium-ion diffusion, leading to excellent fast charging performance, namely, 75% and 58% capacity retention at 5 C and 10 C, respectively. These findings demonstrate a simple and effective approach for fabricating fast-charging cathodes through the use of defect engineering.
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000893036 7001_ $$0P:(DE-HGF)0$$aChen, Xin$$b1
000893036 7001_ $$0P:(DE-HGF)0$$aHuang, Zhongyuan$$b2
000893036 7001_ $$0P:(DE-HGF)0$$aYang, Jinlong$$b3
000893036 7001_ $$0P:(DE-HGF)0$$aLiu, Fusheng$$b4
000893036 7001_ $$0P:(DE-HGF)0$$aChu, Mihai$$b5
000893036 7001_ $$0P:(DE-HGF)0$$aLiu, Tongchao$$b6
000893036 7001_ $$0P:(DE-HGF)0$$aWang, Chaoqi$$b7
000893036 7001_ $$0P:(DE-HGF)0$$aZhu, Weiming$$b8
000893036 7001_ $$0P:(DE-HGF)0$$aLi, Shuankui$$b9
000893036 7001_ $$0P:(DE-HGF)0$$aLi, Shunning$$b10
000893036 7001_ $$0P:(DE-HGF)0$$aZheng, Jiaxin$$b11
000893036 7001_ $$0P:(DE-Juel1)178987$$aChen, Jie$$b12
000893036 7001_ $$0P:(DE-HGF)0$$aHe, Lunhua$$b13
000893036 7001_ $$0P:(DE-Juel1)145711$$aJin, Lei$$b14
000893036 7001_ $$00000-0002-8216-1339$$aPan, Feng$$b15
000893036 7001_ $$0P:(DE-Juel1)131047$$aXiao, Yinguo$$b16$$eCorresponding author
000893036 773__ $$0PERI:(DE-600)2553671-0$$a10.1038/s41467-021-23375-7$$gVol. 12, no. 1, p. 3085$$n1$$p3085$$tNature Communications$$v12$$x2041-1723$$y2021
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