Journal
ENERGY & ENVIRONMENTAL MATERIALS
Volume 5, Issue 3, Pages 883-891Publisher
WILEY
DOI: 10.1002/eem2.12201
Keywords
nickel-plated fabrics; flexible supercapacitor; quasi-solid-state; in-situ growth; intimate contact
Categories
Funding
- National Natural Science Foundation of China [21801200, 22075217]
- National Key Research and Development Program of China [2018YFB1502001]
- Innovative Research Funds of Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHD2020-001]
- Opening Project of Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University [JDGD-202020]
- Fundamental Research Funds for Central Universities [2021IVA137]
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This study solves the problems of weight, limited flexibility and poor interface between active materials and current collectors in the smart wearable market by using cheap and lightweight polyester-based fabrics and in-situ growth. The electrode with ternary component shows excellent electrochemical performance, achieving high areal capacity and realizing an energy density of 0.45 mWh cm(-2) in an all-solid-state supercapacitor device.
Smart wearable market is burgeoning, and flexible energy storage is crucial to cope with its development. The commonly-used metal-based current collectors are heavy with limited flexibility. Other carbon-based current collectors are expensive and fragile. Moreover, the poor interface between active material and current collector leads to unsatisfactory stability. Herein, these two issues are attempted to be solved by using cheap and lightweight polyester-based fabrics as well as in-situ growth. A deposited thin layer of nickel on the fabrics not only enhances the conductivity, but also serves as the sacrificial precursor for the growth of active materials. Thus, intimate contact is secured via chemical bonding. The electrode with ternary (metal-inorganic-organic) component shows excellent electrochemical performance. Namely, high areal capacity is realized (2.2 C cm(-2) at 2 mA cm(-2)), which is far superior to its rigid nickel-foam-based counterpart. Furthermore, an all-solid-state supercapacitor device was assembled. The device provides an areal capacity of 2.03 C cm(-2) at the current density of 2 mA cm(-2). It realizes an energy density of 0.45 mWh cm(-2) when the power density is 1.6 mW cm(-2). This work offers a feasible and cost-efficient way for fabricating electrode materials with excellent performance for portable supercapacitors.
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