典型文献
Is it universal that the layered-spinel structure can improve electrochemical performance?
文献摘要：
The introduction of spinel phase to form the layered-spinel structure (LSS) is an effective way to improve the electrochemical performance of Li-and Mn-rich layered oxides (LMR).But is this structure universal for all LMR systems?In this work,different Mn/Ni ratio systems with the LSS are discussed in detail.It is found that,high discharge capacity (200.8 mA h g-1 at 1C rate;1C =250 mA h g-1) as well as high capacity-retention (94％ at 1C rate after 100 cycles) can be achieved by forming the LSS for low-Ni system(Mn/Ni =5.0).However,the capacity retention decreases severely in the high-Ni system (Mn/Ni =3.5,2.6).For example,when the ratio of Mn/Ni is 3.5,the capacity-retention of the layered-spinel sample was only 65.8％,compared to the 83％ of the original LMR sample.The Ex-situ XRD,XPS,and HRTEM results demonstrate that the introduction of spinel phase in high-Ni system accelerates the transition and collapse of the crystal structure.This work provides guidance for optimizing the proportions of ele-ments and the design of structures for the LMR.
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作者姓名：
Daqiang Wang;Zhenguo Wu;Wei Xiang;Yuxia Liu;Gongke Wang;Kanghui Hu;Qi Xu;Yang Song;Xiaodong Guo
作者机构：
College of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology,Chengdu 610059,Sichuan,China;The Key Laboratory of Life Organic Analysis,Key Laboratory of Pharmaceutical,School of Chemistry and Chemical Engineering,Qufu Normal University,Qufu 273165,Shandong,China;School of Materials Science and Engineering,Henan Normal University,XinXiang 453007,Henan,China
文献出处：
引用格式：
[1]Daqiang Wang;Zhenguo Wu;Wei Xiang;Yuxia Liu;Gongke Wang;Kanghui Hu;Qi Xu;Yang Song;Xiaodong Guo-.Is it universal that the layered-spinel structure can improve electrochemical performance?)[J].能源化学,2022(01):344-353
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0.462036
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