NaCl-Template Assisted Synthesis of 3D Honeycomb-Like LiMnPO4/C with High Rate and Stable Performance as Lithium Ion Battery Cathodes
NaCl-Template Assisted Synthesis of 3D Honeycomb-Like LiMnPO4/C with High Rate and Stable Performance as Lithium Ion Battery Cathodes
复制标题
氯化钠模板辅助合成高倍率、性能稳定的3D蜂窝状LiMnPO4/C作为锂离子电池正极
DOI：
10.1021/acssuschemeng.8b03935
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发表时间：
2018
影响因子：
8.4
通讯作者：
Ping He
中科院分区：
文献类型：
--
作者：
Junzhe Li;Shao-hua Luo;Xueyong Ding;Qing Wang;Ping He
构建具有三维（3D）构型的电极材料已被提出作为实现优异的能量存储性能的有前途的方式。本文采用NaCl模板辅助合成法制备了具有蜂窝状结构的正极材料LiMnPO 4。NaCl颗粒作为牺牲模板，通过煅烧在表面上生长LiMnPO 4/C纳米颗粒。LiMnPO 4/C三维蜂窝状网络具有高度的结晶结构和紧密的界面结合，为锂离子的吸附和嵌入提供了更多的电活性位点，同时也为锂离子的传输和电子传递提供了高导电网络。此外，独特的蜂窝状结构可以有效地缓冲体积膨胀并防止活性材料的团聚。值得注意的是，在3D蜂窝状LiMnPO 4/C阴极中，在0.05 C下获得了161.5 mAh g（-1）的优异可逆容量，并且在10 C的高倍率下在200次循环后具有96.4%的优异的上级容量保持率。我们的工作为电化学储能提供了一个有前途的候选者，也为下一代锂离子电池开辟了新的机会。
Constructing electrode materials with three-dimensional (3D) configurations has been presented as a promising way to achieve excellent properties in energy storage. Here, the cathode material LiMnPO4 with honeycomb-like structure was fabricated via a simple NaCl-template-assisted synthesis strategy. The NaCl particles served as a sacrificial template to grow LiMnPO4/C nanoparticles on the surfaces by calcination. The robust 3D honeycomb-like LiMnPO4/C network possesses a highly crystalline structure and intimate interfacial bonding between adjacent LiMnPO4/C networks, which provides more electroactive sites for lithium-ion adsorption and intercalation as well as a highly conductive network for both lithium-ion transport and electrons transfer. Furthermore, the unique honeycomb-like architecture can effectively buffer volume expansion and prevent the agglomeration of active materials. Remarkably, an excellent reversible capacity of 161.5 mAh g(-1) at 0.05 C and superior capacity retention with 96.4% after 200 cycles at a high discharge rate of 10 C has been obtained in the 3D honeycomb-like LiMnPO4/C cathode. Our work proposes a promising candidate for electrochemical energy storage and also opens up new opportunities for next-generation lithium-ion batteries.