Targeted synthesis of novel hierarchical sandwiched NiO/C arrays as high-efficiency lithium ion batteries anode
Targeted synthesis of novel hierarchical sandwiched NiO/C arrays as high-efficiency lithium ion batteries anode
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靶向合成新型分层夹层NiO/C阵列作为高效锂离子电池负极
DOI：
10.1016/j.jpowsour.2015.09.101
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发表时间：
2016-01-01
影响因子：
9.2
通讯作者：
Wang, Yu
中科院分区：
文献类型：
--
作者：
Feng, Yangyang;Zhang, Huijuan;Wang, Yu
本文首次采用简单可控的水热法在Ti箔上成功地制备出了二维NiO/C纳米阵列。在该策略中，我们使用绿色葡萄糖作为碳源，并将Ni（OH）（2）纳米片阵列作为NiO纳米颗粒的前体和牺牲模板用于耦合石墨化碳层。这种先进的三明治复合材料不仅可以为众多的活性位点提供大的表面积，并使活性材料与电解质之间保持连续接触，而且可以保护活性纳米颗粒免于聚集、粉碎和从导电基底上剥离。高温煅烧过程中大量物质损失形成的多孔结构，可以有效缓冲可能的体积膨胀，促进离子迁移。在这篇文章中，夹层NiO/C阵列，用作LIB的阳极，表现出高的比容量（类似于1458 mAh g（-1）在500 mA g（-1））和优异的倍率性能和循环性能（类似于95.7%的保留后300次循环）。(C)2015爱思唯尔B. V.保留所有权利。
In this contribution, the novel 2D sandwich-like NiO/C arrays on Ti foil are successfully designed and fabricated for the first time via simple and controllable hydrothermal process. In this strategy, we use green glucose as carbon source and ultrathin Ni(OH)(2) nanosheet arrays as precursor for NiO nano-particles and sacrificial templates for coupled graphitized carbon layers. This advanced sandwiched composite can not only provide large surface area for numerous active sites and continuous contact between active materials and electrolyte, but also protect the active nanoparticles from aggregation, pulverization and peeling off from conductive substrates. Furthermore, the porous structure derived from lots of substances loss under high-temperature calcinations can effectively buffer possible volume expansion and facilitate ion transfer. In this article, sandwiched NiO/C arrays, utilized as anode for LIBs, demonstrated high specific capacity (similar to 1458 mAh g(-1) at 500 mA g(-1)) and excellent rate performance and cyclablity (similar to 95.7% retention after 300 cycles). (C) 2015 Elsevier B.V. All rights reserved.