One-step construction of three-dimensional nickel sulfide-embedded carbon matrix for sodium-ion batteries and hybrid capacitors
One-step construction of three-dimensional nickel sulfide-embedded carbon matrix for sodium-ion batteries and hybrid capacitors
复制标题
用于钠离子电池和混合电容器的三维硫化镍嵌入碳基体的一步构建
DOI：
10.1016/j.ensm.2019.09.021
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发表时间：
2020-03-01
影响因子：
20.4
通讯作者：
Qu, Baihua
中科院分区：
文献类型：
--
作者：
Li, Shengyang;He, Wei;Qu, Baihua
采用一步水热法制备了一种由硫化镍纳米颗粒修饰的多孔碳基体（PCM）（记为NiSx@PCM），并成功地用作高性能钠离子电池（SIB）和钠离子混合电容器（SIHC）的电极材料。如此制备的NiSx@PCM在SIB中在0.5A g（-1）下在200次循环中提供650 mAh g（-1）的高可逆容量、出色的倍率容量（在高达20 A g（-1）下为167 mAh g（-1））和优异的循环性能（在1A g（-1）下在800次循环后为300 mAh g（-1））。此外，基于NiSx@PCM复合阳极和商业活性炭阴极的SIHC表现出在140和4480 W kg（-1）的功率密度下分别具有99.3和52.2 Wh kg（-1）的显著高的能量密度。显著的高性能增强应归因于在充电/放电期间三维活性材料-碳网络内的优异的电子/离子传输，其中更导电的硫化镍纳米颗粒在整个多孔碳基质中原位生长。这项工作提出了一种简便的方法来合成三维碳基质，包括金属硫化物纳米颗粒，并提出了新的见解，通过结合电池和超级电容器的优点，进一步推进下一代高能量密度/功率密度储能单元。
A three-dimensional design composing of porous carbon matrix (PCM) decorated with nickel sulfide nanoparticles (denoted as NiSx@PCM) was fabricated through a one-step hydrothermal process, and successfully utilized as an electrode material in high performance sodium-ion batteries (SIBs) and sodium-ion hybrid capacitors (SIHCs). The as-prepared NiSx@PCM delivered a high reversible capacity of 650 mAh g(-1) over 200 cycles at 0.5 A g(-1), outstanding rate capability (167 mAh g(-1) at as high as 20 A g(-1)), and excellent cycle performance (300 mAh g(-1) at 1 A g(-1) after 800 cycles) in the SIBs. In addition, SIHCs based on NiSx@PCM composite anodes and commercial activated-carbon cathodes behaved carried remarkably high energy densities of 99.3 and 52.2 Wh kg(-1) at power densities of 140 and 4480 W kg(-1), respectively. The significantly high-performance enhancement should be attributed to the excellent electron/ion transports within the three-dimensional active material-carbon network during charging/discharging with the in-situ growth of the more conducive nickel sulfide nanoparticles throughout the porous carbon matrix. This work presents a facile method to synthesize three-dimensional carbon matrix incorporating metal sulfide nanoparticles, as well as suggests new insights into further advancing nextgeneration high energy-density/power-density energy storage units by combining the merits of both batteries and supercapacitors.