An effective etching-induced coating strategy to shield LiNi0.8Co0.1Mn0.1O2 electrode materials by LiAlO2
An effective etching-induced coating strategy to shield LiNi0.8Co0.1Mn0.1O2 electrode materials by LiAlO2
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用LiAlO2屏蔽LiNi0.8Co0.1Mn0.1O2电极材料的有效蚀刻诱导涂层策略
DOI：
10.1016/j.jpowsour.2018.11.062
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发表时间：
2019-02
影响因子：
9.2
通讯作者：
Weixin Zhang
中科院分区：
文献类型：
--
作者：
Weijian Tang;Zhangxian Chen;Fan Xiong;Fei Chen;Cheng Huang;Qiang Gao;Tongzhen Wang;Zeheng Yang;Weixin Zhang
富镍LiNixCoyMn 1-x-yO 2（0.5 < x < 1）正极材料由于其高的比容量而成为锂离子电池研究的热点。然而，糟糕的自行车性能和严重的安全问题抵消了它们的好处。在这里，我们提出了一个有效的蚀刻诱导涂层的LiNi0.8Co0.1Mn0.1O2正极材料的表面改性LiAlO 2的策略。AlCl 3水解产生的H +对LiNi0.8Co0.1Mn0.1O2的氢氧化物前驱体进行刻蚀，并在其表面诱导Al（OH）3层的定向沉积，经锂浸渍和退火后，在LiNi0.8Co0.1Mn0.1O2颗粒表面形成均匀的γ-LiAlO 2涂层。2.2wt%的LiAlO 2涂层LiNi 0.8 Co 0.1 Mn 0.1 O 2阴极在10 C下提供135.2 mAh g −1的高倍率容量，并且在0.5 C下200次循环后具有85.8%的长循环能力。此外，LiAlO 2包覆LiNi0.8Co0.1Mn0.1O2的热稳定性也得到了显著提高.电池性能的提高是由于部分Al 3+掺杂和Li +导电的LiAlO 2包覆层为Li +传输提供了良好的连接网络，提高了结构稳定性，并防止了芯材受到副产物的侵蚀。
Nowadays nickel-rich LiNi x Co y Mn 1-x-y O 2 (0.5 < x < 1) cathode materials attract great research interests due totheir high specific capacity in lithium ionbatteries. However, poor cycling performance and serious safetyconcerns trade off their benefits. Here, we present an effective etching-induced coating strategy for surface modification of LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode materials by LiAlO 2 . Hydrolysis of AlCl 3 creates H + to etch thehydroxide precursor of LiNi 0.8 Co 0.1 Mn 0.1 O 2 and to induce oriented deposition of Al(OH) 3 layer on surface of the hydroxide precursor, which is transformed into uniform γ-LiAlO 2 coating on the LiNi 0.8 Co 0.1 Mn 0.1 O 2 particles after the subsequent lithium impregnating and annealing. The 2.2 wt% LiAlO 2 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode delivers a high rate capacity of 135.2 mAh g −1 at 10C and long cyclability with capacity retention of 85.8% after 200 cycles at 0.5 C. In addition, the thermal stability of LiAlO 2 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 is significantly improved. The enhanced battery performances are due to partial Al 3+ doping and Li + conductive LiAlO 2 coating layer that provides well-connected networks for Li + transport, improves the structural stability and prevents core materials from the attack by side products.
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影响因子：
6.7
作者：
Dingzheng Wang;Zhixing Wang;Xinhai Li;Huajun Guo;Yan Xu;Yulei Fan;Wei Pan
通讯作者：
Dingzheng Wang;Zhixing Wang;Xinhai Li;Huajun Guo;Yan Xu;Yulei Fan;Wei Pan
影响因子：
9.2
作者：
Xunhui Xiong;Zhixing Wang;Guochun Yan;Huajun Guo;Xinhai Li
通讯作者：
Xunhui Xiong;Zhixing Wang;Guochun Yan;Huajun Guo;Xinhai Li
影响因子：
6.6
作者：
Meng, Kui;Wang, Zhixing;Wang, Ding
通讯作者：
Wang, Ding
影响因子：
9.2
作者：
Li, Xifei;Liu, Jian;Sun, Xueliang
通讯作者：
Sun, Xueliang
影响因子：
9.5
作者：
Zheng, Jianming;Kan, Wang Hay;Manthiram, Arumugam
通讯作者：
Manthiram, Arumugam