石墨烯负载Ni_(2)P纳米片作为锂硫电池的硫基复合正极材料  

Ni_(2)P Nanosheets on Graphene as Sulfur⁃Based Composite Cathode Material for Lithium⁃Sulfur Batteries

作　　者：高睿 王振宇 王璐 陈鹏 刘胜 马志鹏[1] 邵光杰[1] GAO Rui;WANG Zhen-Yu;WANG Lu;CHEN Peng;LIU Sheng;MA Zhi-Peng;SHAO Guang-Jie(College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;School of Materials Science and Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]燕山大学环境与化学工程学院,秦皇岛066004 [2]南开大学材料科学与工程学院,天津300350

出　　处：《无机化学学报》2022年第4期685-694,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.52174281,22075151);高等学校博士点专项基金(No.B2021203016)资助。

摘　　要：将磷化镍纳米片均匀负载到石墨烯(G)上制备出Ni_(2)P/G复合材料,并将其作为硫载体构筑了硫基复合材料(S/Ni_(2)P/G)。研究表明,磷化镍纳米片对可溶性多硫化物具有强的化学作用和较高的电催化活性,使S/Ni_(2)P/G硫基复合材料表现出良好的电化学性能。特别是,在高硫含量(80.3%)和低电解液用量(15μL·mg^(-1))条件下,S/Ni_(2)P/G硫基复合材料展现出1164.7 mAh·g^(-1)的质量比容量和良好的循环稳定性。此外,S/Ni_(2)P/G复合材料具有高的振实密度(1.02 g·cm^(-3)),其体积比容量高达954.0 mAh·cm^(-3),约为S/G复合材料体积比容量的1.6倍。In this work,nickel phosphide(Ni_(2)P)nanosheets were dispersed uniformly on graphene(G)to fabricate the Ni_(2)P/G composite.Furthermore,the S/Ni_(2)P/G sulfur⁃based composite was prepared further for lithium⁃sulfur batteries.Due to the strong chemical absorbability and high electrocatalytic activity of Ni_(2)P nanosheets towards solu⁃ble polysulfides,S/Ni_(2)P/G composite showed superior electrochemical performance.In particular,under the condi⁃tion of high sulfur content(80.3%)and low electrolyte usage(15μL·mg^(-1)),S/Ni_(2)P/G composite delivered a high initial specific discharge capacity of 1164.7 mAh·g^(-1) and good cycling stability.In addition,due to the high tap density of 1.02 g·cm-3,S/Ni_(2)P/G composite showed a high volumetric capacity of 954.0 mAh·cm-3,almost 1.6 times of that for S/G composite.

关 键 词：锂硫电池 硫正极 石墨烯 磷化镍 

分 类 号：TM911[电气工程—电力电子与电力传动]