Assembly of Multifunctional Ni2P/NiS0.66 Heterostructures and Their Superstructure for High Lithium and Sodium Anodic Performance
Assembly of Multifunctional Ni2P/NiS0.66 Heterostructures and Their Superstructure for High Lithium and Sodium Anodic Performance
复制标题
多功能Ni2P/NiS0.66异质结构及其超结构的组装以实现高锂钠阳极性能
DOI：
10.1021/acsami.7b07939
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发表时间：
2017
影响因子：
9.5
通讯作者：
Wen Zhaoyin
中科院分区：
文献类型：
--
作者：
Wu Tian;Zhang Sanpei;He Qiming;Hong Xiaoheng;Wang Fan;Wu Xiangwei;Yang Jianhua;Wen Zhaoyin
微观和宏观相结合的结构设计可以有效地使电极材料具有极大的锂和钠存储能力。本文通过一种简单有效的策略，成功地构建了Ni2P/NiS0.66异质结构，并将其组装成纳米尺度的超结构。在所获得的超结构中，Ni2P/NiS0.66异质结构均匀地包裹着超薄的碳层(HT-NPS@C)，同时组装成蛋黄壳纳米球。经评估，HTNPS@C作为锂离子电池负极材料，在200 mA g-1循环200次后具有430 mA h g-1的高可逆容量，500次循环后具有超稳定的循环性能，容量损失可忽略不计。此外，采用LiNi1/3Co1/3Mn1/3O2(LNCMO)正极和HTNPS@C负极的硬币型全电池在0.3Ag-1循环50次后，比容量高达323.5 mA h g-1。除了作为锂离子电池负极材料的优异性能外，采用HT-NPS@C球形电极的钠离子电池也表现出显著的电化学性能。
The combination of structure designs at the microscopic and macroscopic level can efficiently enable electrode materials with greatly enhanced lithium and sodium storage. In this paper, the construction of Ni2P/NiS0.66heterostructures and their assembly into a superstructure at the nanoscale were successfully achieved by a facile and effective strategy. In the obtained superstructure, the Ni2P/NiS0.66heterostructures are homogeneously coated with ultrathin carbon layers (HT-NPS@C) and, at the same time, assembled into a yolk–shell nanosphere. Upon evaluation as the anode materials for Li-ion batteries, the HT-NPS@C delivers a high reversible capacity of 430 mA h g–1after 200 cycles at 200 mA g–1and ultrastable cyclability with negligible capacity loss over 500 cycles. Furthermore, the coin-type full cell with the LiNi1/3Co1/3Mn1/3O2(LNCMO) cathode and HT-NPS@C anode deliver a high specific capacity of 323.5 mA h g–1after 50 cycles at 0.3 A g–1. Apart from an excellent performance as promising anode materials for LIBs (Li-ion batteries), the Na-ion batteries with HT-NPS@C sphere electrodes also manifest a remarkable electrochemical performance.