Phosphorous-Based Heterostructure for the Effective Catalysis of Polysulfide Reactions with Phase Changes in High-Sulfur-Loading Lithium-Sulfur Batteries

Zhao, Yun1,2; Zhang, Huanyu1; Ye, Hualin2; Zhao, Dan2; Lee, Jim Yang2; Huang, Limin1

2023-11-01

10.1002/smtd.202300610

SMALL METHODS   影响因子和分区

2366-9608

["High sulfur loading and long cycle life are the design targets of commercializable lithium-sulfur (Li-S) batteries. The sulfur electrochemical reactions from Li2S4 to Li2S, which account for 75% of the battery's theoretical capacity, involve liquid-to-solid and solid-to-solid phase changes in all Li-S battery electrolytes in use today. These are kinetically hindered processes that are exacerbated by a high sulfur loading. In this study, it is observed that an in situ grown bimetallic phosphide/black phosphorus (NiCoP/BP) heterostructure can effectively catalyze the Li2S4 to Li2S reactions to increase the sulfur utilization at high sulfur loadings. The NiCoP/BP heterostructure is a good polysulfide adsorber, and the electric field prevailing at the Mott-Schottky junction of the heterostructure can facilitate charge transfer in the Li2S4 to Li2S2 liquid-to-solid reaction and Li+ diffusion in the Li2S2 to Li2S solid-state reaction. Consequently, a sulfur cathode with the NiCoP/BP catalyst can deliver a specific capacity of 830 mAh g-1 at the sulfur loading of 6 mg cm-2 for 500 cycles at the 0.5 C rate. High sulfur utilization is also possible at a higher sulfur loading of 8 mg cm-2 for 440 cycles at the 1 C rate.","The NiCoP@BP heterostructure is used as electrocatalyst to enhance the sluggish redox kinetics of sulfur cathode. Black phosphorus combined with NiCoP match energy band positions for forming a Mott-Schottky heterojunction. The built-in electric field formed as such facilitates the phase changes conversion of Li2S4(liquid)-> Li2S2(solid)-> Li2S(solid) during cycling. High sulfur utilization is achieved in high sulfur loading Li-S batteries.image"]

heterostruture catalysts high sulfur loading lithium-sulfur batteries Mott-Schottky heterojunctions phase changes

SCI ; EI

英语

第一 ; 通讯

Shenzhen Science and Technology Innovation Commission[JCYJ20220818100212027] ; Shenzhen Science and Technology Innovation Commission[2018B030322001] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2020B121201002] ; Guangdong Provincial Key Laboratory of Catalysis[EMA-EP009-SEGC-020]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001108775900001

WILEY-V C H VERLAG GMBH

20234815120283

Charge transfer ; Electric fields ; Heterojunctions ; Lithium ; Lithium batteries ; Lithium compounds ; Loading ; Phosphorus ; Polysulfides ; Solid state reactions ; Sulfur ; Sulfur compounds

Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Materials Handling Methods:691.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Primary Batteries:702.1.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Synthetic Rubber:818.2.1

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
2.Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore

Zhao, Yun,Zhang, Huanyu,Ye, Hualin,et al. Phosphorous-Based Heterostructure for the Effective Catalysis of Polysulfide Reactions with Phase Changes in High-Sulfur-Loading Lithium-Sulfur Batteries[J]. SMALL METHODS,2023.

Zhao, Yun,Zhang, Huanyu,Ye, Hualin,Zhao, Dan,Lee, Jim Yang,&Huang, Limin.(2023).Phosphorous-Based Heterostructure for the Effective Catalysis of Polysulfide Reactions with Phase Changes in High-Sulfur-Loading Lithium-Sulfur Batteries.SMALL METHODS.

Zhao, Yun,et al."Phosphorous-Based Heterostructure for the Effective Catalysis of Polysulfide Reactions with Phase Changes in High-Sulfur-Loading Lithium-Sulfur Batteries".SMALL METHODS (2023).