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Photo-motivated heterojunctions coupling built-in electric field stimulating sulfur redox kinetics for lithium-sulfur batteries

ملخص البحث
Enhancing the redox kinetics of polysulfides in lithium-sulfur batteries (Li-Ss) by photo-irradiation represents a practical approach. Herein, a photo-assisted rechargeable Li-Ss featuring BVO (BiVO4)/Co3O4 heterojunction nanosheets as a multifunctional cathode is designed. The photogenerated electron-hole pairs in BVO synergistically enhance polysulfide redox kinetics during both charging and discharging. Notably, the internal electric field created by BVO/Co3O4 interface effectively suppresses carrier recombination. Photogenerated electrons accelerate the reduction of S8 to Li2S, while holes promote the oxidation of Li2S to S8. As a result, significant specific capacity enhancement to 1550 mAh/g at 0.5 mA cm−2 is observed. Strikingly, the soft pack batteries can achieve a capacity of 300 mAh/g only by illumination. This research offers a promising avenue for enhancing polysulfide redox kinetics by harnessing and storing solar energy.
مؤلف البحث
Haifeng Zhang, Fei Ma, Ting Meng, Junwei Li, Haifei Zhu, Zeyu Geng, Wenbo Zhao, Xiaohan Wang, Penghui Wu, Abdelnaby M Elshahawy, Qianrui Gao, Quande Che
تاريخ البحث
قسم البحث
مجلة البحث
Chemical Engineering Journal
مؤلف البحث
صفحات البحث
160356
الناشر
Elsevier
تصنيف البحث
International Q1
عدد البحث
506
موقع البحث
https://doi.org/10.1016/j.cej.2025.160356
سنة البحث
2025