Single-Atom-Regulated Heterostructure of Binary Nanosheets to Enable Dendrite-Free and Kinetics-Enhanced Li–S Batteries

Chao Zhou; Ming Li; Nantao HuJianhua YangHong LiJiawei YanPuyi LeiYunpeng ZhuangShouwu Guo

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Single-Atom-Regulated Heterostructure of Binary Nanosheets to Enable Dendrite-Free and Kinetics-Enhanced Li–S Batteries

机译：Single-Atom-Regulated Heterostructure of Binary Nanosheets to Enable Dendrite-Free and Kinetics-Enhanced Li–S Batteries

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Heterostructures show potential as electrodes/functionalized separators forlithium-sulfur (Li-S) batteries owing to their remarkable electroactive andstructural stability. Yet, the heterostructures with unique structures as wellas the regulation of heterointerface electronic structure are still challengingfor high-performance Li–S batteries. Herein, Pt single-atoms (Sas)-regulatedheterostructures of In_2S3_/Ti_3C_2 binary nanosheets (Pt Sas/In_2S_3/Ti_3C_2) arefacilely constructed via an ultrasound-assisted photochemical reductionstrategy for dendrite-free and kinetics-enhanced Li–S batteries. The asdesignedheterostructures of Pt Sas/In2S3/Ti3C2 on separator can stabilize theLi plating/striping on Li anodes even at a high current density of 5 mA cm~(?2).In addition, Pt Sas/In_2S_3/Ti_3C_2 heterostructure can suppress the polysulfideshuttling and exhibit excellent redox electrocatalytic properties for lithium polysulfidesdecomposition. The batteries with heterostructure-modified separatorsshow a high initial discharge capacity of 1068.4 mAh g?1 at 0.5 C, excellent rateperformances (719.6 mAh g~(?1) at 5C), and a remarkable cycling ability. Evenwith a high sulfur loading of 6.4 mg cm~(?2), the pouch cell can deliver an arealcapacity of 5.54 mAh cm~(?2) at 0.2 C. This work not only provides a new route forpreparing SA-catalysts, but also sheds new lights into engineering electronicstructures of heterointerfaces for developing high-performance Li–S batteries.

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来源
《Advanced functional materials》 |2022年第33期|2204635.1-2204635.13|共13页
作者
Chao Zhou; Ming Li; Nantao HuJianhua YangHong LiJiawei YanPuyi LeiYunpeng ZhuangShouwu Guo;
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作者单位

Key Laboratory of Thin Film and MicrofabricationTechnology (Ministry of Education)Department of Electronic EngineeringSchool of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityDong Chuan Road No.800, Shanghai 200240, P. R. Ch;

State Key Laboratory of Transducer TechnologyShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050, P. R. China;

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dual-functional separators; heterostructures; Li–S batteries; photochemical reduction; single-atom;

Single-Atom-Regulated Heterostructure of Binary Nanosheets to Enable Dendrite-Free and Kinetics-Enhanced Li–S Batteries

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