Monolithic Microparticles Facilitated Flower‐Like TiO2 Nanowires for High Areal Capacity Flexible Li‐Ion Batteries

Author:

Luo Li1,Liang Kui1,Khanam Zeba1,Yao Xincheng1,Mushtaq Muhammad1,Ouyang Ting1,Balogun M.‐Sadeeq1ORCID,Tong Yexiang2ORCID

Affiliation:

1. College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan University Changsha 410082 P. R. China

2. School of Chemistry Sun Yat‐sen University Guangzhou 510275 P. R. China

Abstract

AbstractFlexible lithium‐ion batteries (FLIBs) are intensively studied using free‐standing transition metal oxides (TMOs)‐based anode materials. However, achieving high areal capacity TMO‐based anode materials is yet to be effectively elucidated owing to the poor adhesion of the active materials to the flexible substrate resulting in low active mass loading, and hence low areal capacity is realized. Herein, a novel monolithic rutile TiO2 microparticles on carbon cloth (ATO/CC) that facilitate the flower‐like arrangement of TiO2 nanowires (denoted ATO/CC/OTO) is demonstrated as high areal capacity anode for FLIBs. The optimized ATO/CC/OTO anode exhibits high areal capacity (5.02 mAh cm−2@0.4 mA cm−2) excellent rate capability (1.17 mAh cm−2@5.0 mA cm−2) and remarkable cyclic stability (over 500 cycles). A series of morphological, kinetic, electrochemical, in situ Raman, and theoretical analyses reveal that the rational phase boundaries between the microparticles and nanowires contribute to promoting the Li storage activity. Furthermore, a 16.0 cm2 all‐FLIB pouch cell assembled based on the ATO/CC/OTO anode and LiNiCoMnO2 cathode coated on ATO/CC (ATO/CC/LNCM) exhibits impressive flexibility under different folding conditions, creating opportunity for the development of high areal capacity anodes in future flexible energy storage devices.

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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