Synthesis of cobalt- doped nickel sulfide nanomaterials with rich edge sites as high-performance supercapacitor electrode materials

被引：73

作者：

Xie, Shengli ^{[1
,2
]}

Gou, Jianxia ^{[2
]}

Liu, Bin ^{[1
]}

Liu, Chenguang ^{[1
]}

机构：

[1] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[2] Binzhou Univ, Coll Chem & Chem Engn, Binzhou 256603, Peoples R China

来源：

INORGANIC CHEMISTRY FRONTIERS | 2018年 / 5卷 / 05期

基金：

中国国家自然科学基金;

关键词：

HYDROGEN EVOLUTION; OXYGEN REDUCTION; HOLLOW SPHERES; NANOSHEETS; EFFICIENT; GROWTH; COMPOSITE; FOAM; ELECTROCATALYST; NANOFLAKES;

D O I：

10.1039/c8qi00172c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this study, cobalt-doped nickel sulfide nanomaterials are synthesized. The experimental results show that cobalt is successfully doped into the lattice of NiS2. Co-doping causes the hollow sphere sulphides to break down and favors the formation of NixCo1-xS2 nanostructures with high-density active edge sites. The Ni0.75Co0.25S2 sample exhibits a high specific capacitance of 2141.9 F g(-1) at a current density of 2 A g(-1) due to its fluffy characteristics and edge site-enriched nanostructure. The asymmetric supercapacitor based on Ni0.75Co0.25S2 exhibits a high energy density (54.9 Wh kg(-1)) and stable cycling durability with 85.1% capacitance retention after 4000 cycles.

引用

页码：1218 / 1225

页数：8

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