Dual-Functional Z-Scheme TiO2 @MoS2 @NC Multi-Heterostructures for Photo-Driving Ultrafast Sodium Ion Storage

Jinhang Li; Yuqiang Zhang; Yiyang Mao; Yingying Zhao; Dongxiao Kan; Kai Zhu; Shulei Chou; Xitian Zhang; Chunling Zhu; Jing Ren; Yujin Chen

doi:10.1002/anie.202303056

Dual-Functional Z-Scheme TiO₂ @MoS₂ @NC Multi-Heterostructures for Photo-Driving Ultrafast Sodium Ion Storage

Angew Chem Int Ed Engl. 2023 Aug 21;62(34):e202303056. doi: 10.1002/anie.202303056. Epub 2023 Jul 12.

Authors

Jinhang Li¹, Yuqiang Zhang¹, Yiyang Mao², Yingying Zhao^{1

2}, Dongxiao Kan³, Kai Zhu², Shulei Chou⁴, Xitian Zhang⁵, Chunling Zhu², Jing Ren¹, Yujin Chen^{1

2}

Affiliations

¹ Key Laboratory of In-Fiber Integrated Optics (Ministry of Education), College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin, 150001, China.
² Laboratory of Superlight Materials and Surface Technology (Ministry of Education), College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.
³ Northwest Institute for Non-Ferrous Metal Research Xi'an, Shaanxi, 710016, China.
⁴ Institute for Carbon Neutralization, College of Chemistry and Materials Engineering, Wenzhou University Wenzhou, Zhejiang, 325035, China.
⁵ Key Laboratory for Photonic and Electronic Bandgap Materials (Ministry of Education), School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, China.

PMID: 37243514
DOI: 10.1002/anie.202303056

Abstract

Exploiting dual-functional photoelectrodes to harvest and store solar energy is a challenging but efficient way for achieving renewable energy utilization. Herein, multi-heterostructures consisting of N-doped carbon coated MoS₂ nanosheets supported by tubular TiO₂ with photoelectric conversion and electronic transfer interfaces are designed. When a photo sodium ion battery (photo-SIB) is assembled based on the heterostructures, its capacity increases to 399.3 mAh g^-1 with a high photo-conversion efficiency of 0.71 % switching from dark to visible light at 2.0 A g^-1 . Remarkably, the photo-SIB can be recharged by light only, with a striking capacity of 231.4 mAh g^-1 . Experimental and theoretical results suggest that the proposed multi-heterostructures can enhance charge transfer kinetics, maintain structural stability, and facilitate the separation of photo-excited carriers. This work presents a new strategy to design dual-functional photoelectrodes for efficient use of solar energy.

Keywords: Direct Z-Scheme Heterostructure; Dual-Functional Photoelectrode; Harvest and Store Solar Energy; Photoelectric Conversion and Electronic Transfer Interfaces; Sodium Ion Storage.

Abstract

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