Effects of Li2SO4·H2O amounts on morphologies of hydrothermal synthesized LiMnPO4 cathodes
Effects of Li2SO4·H2O amounts on morphologies of hydrothermal synthesized LiMnPO4 cathodes
复制标题
Li2SO4·H2O用量对水热合成LiMnPO4正极形貌的影响
作者：
潘晓亮;曾莹莹;高芝;谢世坤;肖芬;刘丽君
开发具有高倍率性能的工业LiMnPO 4阴极仍然是一个巨大的挑战，因为其Li+扩散速度慢，电子电导率低。在这里，我们希望通过以分散良好的方式控制其形态来解决这些固有的障碍。通过结构表征和形貌表征，研究了Li 2SO 4. H2O添加量对水热法制备LiMnPO 4样品形貌的影响。在独立实验的基础上，尝试性地提出了两步反应来理解LiMnPO 4样品的形成和Li 2SO 4·H2O的双重作用。对于合成LiMnPO 4样品，高SO 42-浓度可能有助于快速成核速率，而高Li+浓度可能有利于快速生长速率。结果表明，在所有LiMnPO 4样品中，以40 mmol Li 2SO 4. H2O（记为S4）为原料制备的LiMnPO 4样品的放电容量、倍率性能和循环稳定性最好，这与其分散性良好有关。
Developing an industrial LiMnPO4 cathode, featuring a high rate capability, is still a huge challenge because of its slow Li+ diffusion speed as well as low electronic conductivity. Here, we expect to address these inherent obstacles by controlling its morphology in a well-dispersed way. The effects of the added amounts of Li2SO4·H2O on the morphologies of the LiMnPO4 samples prepared via the hydrothermal method were studied using structural and morphological characterizations. Based on the additional independent experiments, a two-step reaction was tentatively proposed to understand the formation of the LiMnPO4 samples and the dual functions of Li2SO4·H2O. For synthesizing LiMnPO4 samples, a high SO42− concentration may be helpful for a fast nucleation rate, while a high Li+ concentration can be beneficial for a rapid growth rate. The results showed that the LiMnPO4 sample prepared with 40 mmol Li2SO4·H2O (denoted as the S4) exhibited the best electrochemical performances in terms of the discharge capacity, the rate capability and the cycling stability among all the LiMnPO4 samples, which was reasonably attributed to its well-dispersed characteristics.
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影响因子：
6.6
作者：
H. Shu;Xian-you Wang;Weicheng Wen;Qianqian Liang;Xiukang Yang;Qiliang Wei;Benan Hu;Li Liu;
通讯作者：
H. Shu;Xian-you Wang;Weicheng Wen;Qianqian Liang;Xiukang Yang;Qiliang Wei;Benan Hu;Li Liu;
影响因子：
3.9
作者：
Kaipeng Wu;Guo-rong Hu;Zhongdong Peng;Zhijian Zhang;Yanbing Cao;K. Du
通讯作者：
Kaipeng Wu;Guo-rong Hu;Zhongdong Peng;Zhijian Zhang;Yanbing Cao;K. Du
影响因子：
3.9
作者：
Zhijian Zhang;Guo-rong Hu;Yanbing Cao;J. Duan;K. Du;Zhongdong Peng
通讯作者：
Zhijian Zhang;Guo-rong Hu;Yanbing Cao;J. Duan;K. Du;Zhongdong Peng
影响因子：
--
作者：
Liguang Wang;Pengjian Zuo;Geping Yin;Yulin Ma;Xinqun Cheng;C. Du;Yunzhi Gao
通讯作者：
Liguang Wang;Pengjian Zuo;Geping Yin;Yulin Ma;Xinqun Cheng;C. Du;Yunzhi Gao
影响因子：
3.7
作者：
W. Geng;T. Ohno
通讯作者：
W. Geng;T. Ohno