Various Structured Molybdenum-based Nanomaterials as Advanced Anode Materials for Lithium ion Batteries.
Various Structured Molybdenum-based Nanomaterials as Advanced Anode Materials for Lithium ion Batteries.
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DOI：
10.1021/acsami.6b16251
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发表时间：
2017-03
影响因子：
9.5
通讯作者：
Zexing Wu;W. Lei;Jie Wang;Rong Liu;Kedong Xia;Cuijuan Xuan;Deli Wang
中科院分区：
文献类型：
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作者：
Zexing Wu;W. Lei;Jie Wang;Rong Liu;Kedong Xia;Cuijuan Xuan;Deli Wang
开发了一种简单且可扩展的溶剂热高温处理策略，以构建少于三层的多层超小MoS 2。它们嵌入碳球（MoS 2-C）中，可用作锂离子电池（LIB）的高级阳极材料。在所得结构中，MoS 2表面与碳球之间的紧密接触可以有效地避免MoS 2在锂化-脱锂过程中的聚集和体积膨胀。此外，它显著提高了电极的结构完整性，而导电碳球提供了电极内电子和离子的快速传输。得益于这种独特的结构，所得的混合物表现出出色的电化学性能，包括优异的倍率性能（在0.5、2和5 A g-1下为1085、885和510 mAh g-1），以及在高倍率下的上级循环稳定性（在0.5 A g-1下500次循环后保持100%的初始容量）。使用相同的方法，制备用于LIB的负载在碳球上的碳化钼和磷化钼（Mo 2C-C和MoP-C）。因此，由于其特定的层状结构，MoS 2-C表现出出色的锂储存容量。本研究调查了用于储能的少层结构超小MoS 2的大规模生产能力，并彻底比较了钼化合物的锂存储性能。
A facile and scalable solvothermal high-temperature treatment strategy was developed to construct few-layered ultrasmall MoS2 with less than three layers. These are embedded in carbon spheres (MoS2-C) and can be used as advanced anode material for lithium ion batteries (LIBs). In the resulting architecture, the intimate contact between MoS2 surface and carbon spheres can effectively avert aggregation and volume expansion of MoS2 during the lithiation-delithiation process. Moreover, it improves the structural integrity of the electrode remarkably, while the conductive carbon spheres provide quick transport of both electrons and ions within the electrode. Benefiting from this unique structure, the resulting hybrid manifests outstanding electrochemical performance, including an excellent rate capability (1085, 885, and 510 mAh g-1 at 0.5, 2, and 5 A g-1), and a superior cycling stability at high rates (maintaining 100% of the initial capacity following 500 cycles at 0.5 A g-1). Using identical methods, molybdenum carbide and phosphide supported on carbon spheres (Mo2C-C, and MoP-C) were prepared for LIBs. As a result, MoS2-C exhibits outstanding lithium storage capacities due to its specific layered structure. This study investigates large-scale production capabilities of few-layered structure ultrasmall MoS2 for energy storage, and thoroughly compares lithium storage performance of molybdenum compounds.