Conductive Porous Laminated Vanadium Nitride as Carbon-Free Hosts for High-Loading Sulfur Cathodes in Lithium-Sulfur Batteries

被引：113

作者：

Liu, Ruiqing ^{[1
,2
]}

Liu, Wenhui ^{[1
,2
]}

Bu, Yali ^{[1
,2
]}

Yang, Weiwei ^{[1
,2
]}

Wang, Cheng ^{[1
,2
]}

Priest, Cameron ^{[3
]}

Liu, Zhiwei ^{[1
,2
]}

Wang, Yizhou ^{[1
,2
]}

Chen, Jianyu ^{[1
,2
]}

Wang, Yunhui ^{[4
]}

Cheng, Jie ^{[4
]}

Lin, Xiujing ^{[1
,2
]}

Feng, Xiaomiao ^{[1
,2
]}

Wu, Gang ^{[3
]}

Ma, Yanwen ^{[1
,2
]}

Huang, Wei ^{[1
,2
,5
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Inst Adv Mat IAM, Key Lab Organ Elect & Informat Displays, Nanjing 210023, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Inst Adv Mat IAM, Jiangsu Key Lab Biosensors, Nanjing 210023, Peoples R China

[3] Univ Buffalo State Univ New York, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

[4] Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Peoples R China

[5] Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, Xian 710072, Peoples R China

来源：

ACS NANO | 2020年 / 14卷 / 12期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

porous laminated structure; vanadium nitride; carbon-free; high sulfur loading; chemical adsorption; lithium-sulfur batteries; GRAPHENE; LI; PROGRESS; SPHERE;

D O I：

10.1021/acsnano.0c07415

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Improving the sulfur loading in cathodes is a significant challenge for practical lithium-sulfur batteries. Although carbonaceous sulfur hosts can achieve higher sulfur content and loading, the low tap densities of carbonaceous materials lead to low volumetric energy densities, restricting practical application. Here, conductive porous laminated vanadium nitride (VN) as a carbon-free sulfur host has been successfully developed to construct high tap density, high sulfur loading, and high energy density sulfur electrodes. The laminated stacking multiscale VN featuring interconnected holes possesses high storage space for sulfur loading, achieving high sulfur loading and utilization. VN@S materials' sulfur content and tap density can achieve 80 wt % and 1.17 g cm(-3), respectively. At the sulfur loading of 1.0 mg cm(-2), the VN@S cathode reaches the reversible capacity of 790 mAh g(-1) at 1 C after 200 cycles and 145.2 mAh g(-1) at 15 C after 500 cycles. Precisely, at a high sulfur loading of 12.6 mg cm(-2), the VN@S cathode delivers a reversible capacity of 518.8 mAh g(-1) (485.6 mAh cm(-3)) at 0.1 C after 100 cycles.

引用

页码：17308 / 17320

页数：13

共 64 条

[1] Rational Design of Cathode Structure for High Rate Performance Lithium-Sulfur Batteries [J].