High-Performance and Ultraflexible Aqueous Rechargeable Lithium-Ion Batteries Developed by Constructing All Binder-free Electrode Materials

Ping Man; Bing He; Qichong Zhang; Chaowei Li; Zhenyu Zhou; Qiulong Li; Weigao Xu; Guo Hong; Yagang Yao

doi:10.1021/acsami.0c00341

High-Performance and Ultraflexible Aqueous Rechargeable Lithium-Ion Batteries Developed by Constructing All Binder-free Electrode Materials

ACS Appl Mater Interfaces. 2020 Jun 10;12(23):25700-25708. doi: 10.1021/acsami.0c00341. Epub 2020 May 28.

Authors

Ping Man^{1

2

3}, Bing He^{1

3

4}, Qichong Zhang³, Chaowei Li^{2

5

6}, Zhenyu Zhou^{1

3}, Qiulong Li², Weigao Xu², Guo Hong^{5

6}, Yagang Yao^{1

2

4}

Affiliations

¹ School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China.
² National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
³ Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Joint Key Laboratory of Functional Nanomaterials and Devices, CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
⁴ Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Nanchang, Chinese Academy of Sciences, Nanchang 330200, China.
⁵ Institute of Applied Physics and Materials Engineering., University of Macau, Avenida da Universidade, Taipa, Macau SAR 999078, P. R. China.
⁶ Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Avenida da Universidade, Taipa, Macau SAR 999078, P. R. China.

PMID: 32407067
DOI: 10.1021/acsami.0c00341

Abstract

Aqueous rechargeable lithium-ion batteries (ARLIBs) as alternative energy storage devices have attracted tremendous attention because of their low cost and high safety. However, it is still a significant challenge to develop flexible high-performance ARLIBs for powering wearable devices because of the lack of all binder-free electrode materials. In this study, we develop one-step hydro-/solvothermal methods to design binder-free electrodes of LiCoO₂ polygonal-sheeted arrays and rugby ball-shaped NaTi₂(PO₄)₃ on carbon nanotube fibers as the cathode (LCO@CNTF) and the anode (NTP@CNTF). Both the electrodes are prepared at low temperatures without an extra calcination process, which is a great improvement for the growth process. The electrodes deliver remarkable capacity and extraordinary rate performance in a saturated Li₂SO₄ solution. Meanwhile, because of the synergy of LCO@CNTF and NTP@CNTF, an impressive capacity of 45.24 mA h cm^-3 and an admirable energy density of 67.86 mW h cm^-3 are achieved for the assembled quasi-solid-state fiber-shaped flexible ARLIB (FARLIB), which outperform most reported fiber-shaped aqueous rechargeable batteries. More encouragingly, our FARLIB possesses good flexibility, with a 94.74% capacity retention after bending 3000 times. Thus, this work represents a significant step toward developing FARLIBs and provides a new prospect in the design of wearable energy storage devices.

Keywords: LiCoO2; NaTi2(PO4)3; aqueous lithium-ion battery; binder-free electrodes; fiber-shaped.