首页|Approaching the theoretical capacity of TiO2 anode in a photo-rechargeable lithium-ion battery

Approaching the theoretical capacity of TiO2 anode in a photo-rechargeable lithium-ion battery

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New generation of lithium-ion batteries(LIBs)integrating solar energy conversion and storage is emerging,as they could solve the fluctuation problem in the utilization of solar energy.Photo-rechargeable lithium-ion batteries(PR-LIBs)are ideal devices for such target,in which solar energy is converted into electricity and stored in LIB.In order to achieve the high performance of PR-LIB,it is crucial to develop dual-function electrode materials that can synergistically capture solar energy and store lithium.Herein,we present photo-rechargeable lithium-ion batteries using defective black TiO2 as photoanode prepared by lithium reduction.The photoanode exhibits excellent photo response in full solar spectrum with a capacity enhancement of 46.4％under illumination,corresponding to the energy conversion efficiency of 4.4％at the current density of 1 A·g-1.When illumination is applied at 20 mA·g-1,the battery capacity increases from～230 in dark to～349 mAh·g-1 at the first cycle,and then stabilizes at 310 mAh·g-1,approaching the theoretical value of 335 mAh·g-1 of TiO2 electrode material.This finding provides thoughts for breaking the capacity limitations in TiO2 and paves the way for powering LIBs by solar illumination.

photo-rechargeablelithium-ion batteriesphotoanodedefective TiO2(D-TiO2)

Wen Yan、Jie Wang、Qing Hu、Jingjing Fu、Mohamed K.Albolkany、Tian Zhang、Xiao Lu、Fei Ye、Bo Liu

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School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China

Hefei National Laboratory for Physical Sciences at the MicroscaleHefei Science Center of Chinese Academy of SciencesFujian Institute of Innovation of Chinese Academy of SciencesNational Key Research and Development Program of ChinaNational Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesHefei National Synchrotron Radiation Laboratory

2021YFA1500402215711675150228222075266WK2060190053WK2060190100BL10B

2024

10.1007/s12274-023-6062-7

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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