双金属片
硫黄
纳米颗粒
锂(药物)
碳纤维
材料科学
多孔性
寄主(生物学)
化学工程
锂离子电池的纳米结构
纳米技术
阳极
化学
冶金
复合材料
电极
金属
工程类
复合数
内分泌学
生态学
医学
生物
物理化学
作者
Ling Bai,Zeliang Guan,Jingjing Nie,Binyang Du
标识
DOI:10.1016/j.cej.2023.143187
摘要
Lithium-sulfur battery (LSB) is one of the most appealing candidates for advanced next-generation electrochemical energy storage systems based on the merits of extraordinary theoretical specific energy density, abundant resources and environmental friendliness of sulfur. However, the ‘‘shuttle effect” of lithium polysulfides (LiPSs) and low utilization of sulfur cathode severely plague the large-scale commercialization of the LSBs. In this work, a novel host material for sulfur cathode, namely porous carbon (PC) decorated with NiCo2O4 nanoparticles (NiCo2O4/PC), was designed and prepared. Among all tested NiCo2O4 nanoparticles with different morphologies, the NiCo2O4 nanoparticles with honeycomb pore shape (C-NiCo2O4) showed excellent performance as sulfur cathode host. Benefiting from the synergistic advantages between PC and C-NiCo2O4 nanoparticles, the C-NiCo2O4/PC host materials showed strong adsorption for LiPSs, promising the alleviation of shuttle effect and promoting the catalytic conversion process of LiPSs. As a result, the LSBs with [email protected]2O4/PC cathode delivered a high specific capacity of 1065.2 mAh g−1 at 0.1C, a stable cycling over 500 cycles with low fading rate of 0.053% per cycle at 0.5C and an enhanced rate capability compared with those of [email protected]2O4 and [email protected] cathodes. This work demonstrated the synergistic effect of physical shackle from PC and adsorption-catalysis from NiCo2O4 nanoparticles, which might provide new insights into the optimization of carbonaceous architecture for rationally regulating the polysulfide redox reactions.
科研通智能强力驱动
Strongly Powered by AbleSci AI