Vanadium Nitride Quantum Dots/Holey Graphene Matrix Boosting Adsorption and Conversion Reaction Kinetics for High-Performance Lithium-Sulfur Batteries

Li, Fu1; Zhang, Mengjie1; Chen, Wenyan1; Cai, Xin1; Rao, Huashang1; Chang, Jian2; Fang, Yueping1; Zhong, Xinhua1; Yang, Yu1; Yang, Zhuohong1; Yu, Xiaoyuan1

2021-07-07

10.1021/acsami.1c08113

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Lithium-sulfur batteries (LSBs) have been considered as potential next-generation energy storage systems due to their high specific energy of 2600 Wh kg(-1) and 2800 Wh L-1. Nevertheless, the practical application of LSBs still faces several hazards, including the shuttle effect of soluble lithium polysulfides, low electrical conductivities of solid sulfur and lithium sulfides, and large volume expansion during charge/discharge cycles. To address this critical challenge, we innovatively proposed facile synthesis of nanostructured VN quantum dots (VNQD)/holey graphene matrix for stabilizing the sulfur cathode by simultaneously promoting the trapping, anchoring, and catalyzing efficiencies of both LiPSs and Li2S. Benefiting from abundant edge catalytic sites of VNQD, in-plane nanopores of graphene, and high electrical conductivity, the sulfur host not only provides high adsorption capability toward soluble polysulfides, strong binding ability for anchoring solid Li2S, and their rapid conversion kinetics but also contributes abundant sulfur storage sites and efficient transport pathways for lithium ions (Li+) and electrons. Consequently, the sulfur cathode exhibits high initial capacities of 1320 mAh g(-1), high rate capability (850 mAh g(-1) @ 4 mA cm(-2)), and high capacity retention of 99.95% per cycle after 500 cycles, providing a feasible solution for the practical utilization of shuttle-free Li-S batteries.

lithium-sulfur batteries VN quantum dots holey graphene shuttle effects polysulfide conversion

SCI ; EI

英语

通讯

Natural Science Foundation of Guangdong Province[2017A030313083] ; Science and Technology Foundation of Guangdong Province[2020A0505100051] ; Guangdong Key Laboratory of Battery Safety[2019B121203008] ; Science and Technology Program of the State Administration for Market Regulation of China[2020MK127] ; National Natural Science Foundation of China[21805127] ; Qingyuan Science and Technology Planning Project[2019DZX018]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000672492800047

AMER CHEMICAL SOC

20212910658324

Binding sites ; Cathodes ; Electric conductivity of solids ; Energy storage ; Graphene ; Lithium compounds ; Lithium-ion batteries ; Nanocrystals ; Polysulfides ; Reaction kinetics ; Semiconductor quantum dots ; Sulfur compounds ; Vanadium compounds

Energy Storage:525.7 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1

Web of Science

1.South China Agr Univ, Coll Mat & Energy, Key Lab Biobased Mat & Energy, Minist Educ, Guangzhou 510642, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China

Li, Fu,Zhang, Mengjie,Chen, Wenyan,et al. Vanadium Nitride Quantum Dots/Holey Graphene Matrix Boosting Adsorption and Conversion Reaction Kinetics for High-Performance Lithium-Sulfur Batteries[J]. ACS Applied Materials & Interfaces,2021,13(26):30746-30755.

Li, Fu.,Zhang, Mengjie.,Chen, Wenyan.,Cai, Xin.,Rao, Huashang.,...&Yu, Xiaoyuan.(2021).Vanadium Nitride Quantum Dots/Holey Graphene Matrix Boosting Adsorption and Conversion Reaction Kinetics for High-Performance Lithium-Sulfur Batteries.ACS Applied Materials & Interfaces,13(26),30746-30755.

Li, Fu,et al."Vanadium Nitride Quantum Dots/Holey Graphene Matrix Boosting Adsorption and Conversion Reaction Kinetics for High-Performance Lithium-Sulfur Batteries".ACS Applied Materials & Interfaces 13.26(2021):30746-30755.