Identification of polypyrrole-encapsulated BiSCl as a viable conversion/alloying anode material for high-performance lithium storage

Li，Sen1; Huang，Zhiyuan1; Hua，Yingkai2; Liu，Xingchen1; Chen，Xi3; Feng，Qi4; Feng，Jun1,5,6

2024-08-01

10.1016/j.mtener.2024.101590

Materials Today Energy   影响因子和分区

2468-6069

Anode materials combining conversion and alloying mechanisms are increasingly valued in advanced rechargeable batteries for their exceptional theoretical capacities and advantageous working voltages. This study showcases BiSCl as a promising conversion/alloying anode material, demonstrating a high specific capacity and enhanced durability through polypyrrole encapsulation. Employing in situ X-ray diffraction, X-ray photoelectron spectroscopy, ex situ transmission electron microscopy, and field emission scanning electron microscopy, we offer a detailed analysis of the lithiation mechanism in BiSCl. The anode exhibits a low average working potential of approximately 0.6 V, supporting a theoretical specific capacity of 784 mAh/g and a volumetric capacity of 4664 mAh/cm. The innovative BiSCl-PPy core-shell composite effectively addresses the challenges of volumetric expansion and polysulfide dissolution. This composite delivers a remarkable reversible capacity of 753 mAh/g at a current rate of 100 mA/g, maintaining 96% of its specific capacity over 400 cycles, and sustains 419 mAh/g at 500 mA/g after 800 cycles, demonstrating more superior performance than that of BiSCl. These findings establish BiSCl as a highly promising conversion/alloying anode material for lithium storage, significantly enhanced in durability by the BiSCl-PPy core-shell composite.

BiSCl Conversion/alloying anode Core-shell structure Lithium storage Polypyrrole

SCI ; EI

英语

第一 ; 通讯

20242416254862

Chlorine compounds ; Durability ; Field emission microscopes ; High resolution transmission electron microscopy ; Lithium ; Polypyrroles ; Scanning electron microscopy ; Shells (structures) ; Storage (materials) ; X ray photoelectron spectroscopy

Structural Members and Shapes:408.2 ; Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Storage:694.4 ; Electron Tubes:714.1 ; Optical Devices and Systems:741.3 ; Organic Polymers:815.1.1

2-s2.0-85195676887

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Department of Industrial Systems Engineering,The Hong Kong Polytechnic University,Hong Kong SAR,100872,China
3.Department of Pharmacology,Graduate School of Medicine,Kagawa University,Takamatsu,1750-1,761-0793,Japan
4.Department of Advanced Materials Science,Faculty of Engineering and Design,Kagawa University,Takamatsu,2217-20,761-0396,Japan
5.Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
6.Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Li，Sen,Huang，Zhiyuan,Hua，Yingkai,et al. Identification of polypyrrole-encapsulated BiSCl as a viable conversion/alloying anode material for high-performance lithium storage[J]. Materials Today Energy,2024,44.

Li，Sen.,Huang，Zhiyuan.,Hua，Yingkai.,Liu，Xingchen.,Chen，Xi.,...&Feng，Jun.(2024).Identification of polypyrrole-encapsulated BiSCl as a viable conversion/alloying anode material for high-performance lithium storage.Materials Today Energy,44.

Li，Sen,et al."Identification of polypyrrole-encapsulated BiSCl as a viable conversion/alloying anode material for high-performance lithium storage".Materials Today Energy 44(2024).