Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 23, Pages 25700-25708Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c00341
Keywords
LiCoO2; NaTi2(PO4)(3) binder-free electrodes; fiber-shaped; aqueous lithium-ion battery
Funding
- Fundamental Research Funds for the Central Universities [020514380183]
- National Natural Science Foundation of China [51972162, 51703241]
- Key Research Program of Frontier Science of Chinese Academy of Sciences [QYZDB-SSW-SLH031]
- Science and Technology Project of Nanchang [2017-SJSYS-008]
- University of Macau [SRG2016-00092-IAPME, MYRG2018-00079-IAPME, MYRG2019-00115-IAPME]
- Science and Technology Development Fund, Macau SAR [FDCT081/2017/A2, FDCT0059/2018/A2, FDCT009/2017/AMJ]
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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.
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