Nickel Foam Coated by Ni Nanoparticle-Decorated 3D Nanocarbons as a Freestanding Host for High-Performance Lithium–Sulfur Batteries
Nickel Foam Coated by Ni Nanoparticle-Decorated 3D Nanocarbons as a Freestanding Host for High-Performance Lithium–Sulfur Batteries
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镍纳米粒子装饰的 3D 纳米碳涂层镍泡沫作为高性能锂硫电池的独立主体
DOI：
10.1021/acsami.2c19987
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发表时间：
2023
影响因子：
9.5
通讯作者：
Gui-Ping Dai
中科院分区：
文献类型：
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作者：
Qun-Yi Zhou;Long Tan;Tong-Bao Lv;Meng-Chao Li;Jing-Jian Zhang;Zhi-Qing Zhao;Xin-Jian Jin;Zhi Liu;Pei-Pei Hou;Zheling Zeng;Shuguang Deng;Gui-Ping Dai
采用化学气相沉积法在泡沫镍表面沉积了由碳纳米管(CNTs)和碳纳米纤维(CNF)组成的纳米碳化物(NCs)。碳纳米管在碳纳米管表面形成导电网络，碳纳米管垂直于碳纳米管表面生长，并在碳纳米管末端形成镍纳米颗粒(Ni NPs)。采用具有多孔结构的镍碳纳米管作为锂硫(Li-S)电池的三维集电器，为电池内部的电极材料提供了足够的空间。因此，包覆的纳滤膜收集器的三维互联导电骨架结合在电极材料中，缩短了电子传递路径，生成的纳米镍能够吸附多硫化物锂(LiPS)，并有效地加速了LiPSs的转化动力学，从而抑制了“穿梭效应”。此外，NF的刚性骨架也会限制电极组合物的运动，这有利于锂S电池的稳定性。事实上，基于Ni-NCS包覆的NF收集器的Li-S电池在0.1C下的首次放电容量高达1472mAHg-1，在3C(802mAHg-1)下具有出色的高倍率性能。此外，在0.2C(300周)和0.5C(500周)下分别获得了0.067%和0.08%的低衰减率。总体而言，我们制备的Ni-NCS包覆的NF集热器在高性能锂-S电池中的应用前景广阔。
Nanocarbons (NCs) consisting of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) were coated on the surface of nickel foam (NF) via a chemical vapor deposition method. The CNFs formed conductive networks on NF, while the CNTs grew perpendicular to the surface of the CNFs, accompanied with the formation of Ni nanoparticles (Ni NPs) at the end of CNTs. The unique Ni-NCs-coated NF with a porous structure was applied as the three-dimensional (3D) current collector of lithium–sulfur (Li–S) batteries, which provided enough space to accommodate the electrode materials inside itself. Therefore, the 3D interconnected conductive framework of the coated NF collector merged in the electrode materials shortened the path of electron transport, and the generated Ni NPs could adsorb lithium polysulfides (LiPSs) and effectively accelerated the conversion kinetics of LiPSs as well, thereby suppressing the “shuttle effect”. Moreover, the rigid framework of NF would also constrain the movement of the electrode compositions, which benefited the stability of the Li–S batteries. As a matter of fact, the Li–S battery based on the Ni-NCs-coated NF collector delivered an initial discharge capacity as high as 1472 mAh g–1at 0.1C and outstanding high rate capability at 3C (802 mAh g–1). Additionally, low decay rates of 0.067 and 0.08% at 0.2C (300 cycles) and 0.5C (500 cycles) have been obtained, respectively. Overall, our prepared Ni-NCs-coated NF collector is promising for the application in high-performance Li–S batteries.