Improved-quality graphene film decorated with ultrafine MnO2 nanoparticles as a multifunctional current collector for high-reversibility zinc-ion batteries
- Lee, Young-Geun; Kim, Seoyeong; Lee, Keun Young; Jo, Yong-Ryun; An, Geon-Hyoung
- Issue Date
- all-solid-state battery; current collector; graphene film; reversibility; zinc-ion battery
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.5, pp.6817 - 6832
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Start Page
- End Page
- Zinc-ion batteries (ZIBs) are considered as a reasonable alternative to lithium-ion batteries (LIBs) due to their satisfactory safety levels, low cost, and eco-friendliness. Nevertheless, the ZIBs have suffered from rapid capacity fading and unstable cycling stability due to poor reversibility. To overcome this issue, a suitable current collector with high electrical conductivity and good interfacial adhesion to the electrode material is essential. Herein, for the first time, an improved-quality graphene film (IQGF) is uniformly decorated with ultrafine manganese oxide nanoparticles (UFMP) and the resulting UFMP@IQGF composite is used as a multifunctional current collector. The as-fabricated ZIB exhibits a superb energy storage performance and reversibility, with an improved specific capacity of 404.7 mA h g(-1) at a current density of 0.1 A g(-1), and an excellent ultrafast cycling stability, with a capacity retention of 83.7% for up to 300 cycles at a current density of 2.0 A g(-1). Moreover, the all-solid-state ZIB using a gel-electrolyte exhibits a good energy storage performance, mechanical flexibility, and feasibility for practical applications.
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- 융합기술공과대학 > Department of Energy Engineering > Journal Articles
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