Three-dimensionally interconnected nickel-antimony intermetallic hollow nanospheres as anode material for high-rate sodium-ion batteries
Three-dimensionally interconnected nickel-antimony intermetallic hollow nanospheres as anode material for high-rate sodium-ion batteries
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三维互连镍锑金属间空心纳米球作为高倍率钠离子电池负极材料
DOI：
10.1016/j.nanoen.2015.07.020
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发表时间：
2015-09-01
期刊：
影响因子：
17.6
通讯作者：
Yu, Yan
中科院分区：
文献类型：
--
作者：
Liu, Jun;Yang, Zhenzhong;Yu, Yan
采用结晶化的三维互联Ni纳米球前驱体和随后的含Sb离子的电取代反应，采用简单、低温的方法制备了用于钠离子电池的三维互联NiSb金属间空心纳米球。三维互联的中空结构和Ni基体的包封使得该铋基阳极具有优异的结构稳定性和较高的电化学性能。在1C、5C、10C下循环150次后，它们分别表现出400、372、230 mA h g（-1）的高度稳定和可观的放电容量。在300 mA/g（Sb）电流密度下，Na0.4Mn0.54-Co0.46O2//NiSb电池的充放电容量为451 mA h g(-1)，充放电容量为301 mA h g(-1)，且稳定性较好，20次循环后仍能保持初始放电容量的75%。(C) 2015 Elsevier Ltd.版权所有。
Three-dimensionally interconnected NiSb intermetallic hollow nanospheres for Na-ion batteries are prepared by a facile and low-temperature approach involving crystallized 3D interconnected Ni nanospheres precursor and subsequent galvanic replacement reaction involving Sb ions. The 3D interconnected hollow structure and Ni matrix encapsulation contribute significantly to the excellent structure stability and high electrochemical performance of the Sb-based anode. They exhibit highly stable and substantial discharge capacities of 400, 372, 230 mA h g(-1) after 150 cycles at 1C, 5C, 10C, respectively. Moreover, a full Na0.4Mn0.54-Co0.46O2//NiSb battery shows at a current density of 300 mA/g(Sb) a charge and discharge capacity of 451 and 301 mA h g(-1), respectively, and also displayed relatively good stability, retaining 75% of the initial discharge capacity after 20 cycles. (C) 2015 Elsevier Ltd. All rights reserved.