Journal
CHEMICAL ENGINEERING JOURNAL
Volume 414, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.128916
Keywords
Zinc-ion batteries; Cathode; Manganese oxide; Free-standing electrode; Flexible graphene film; Solid-state battery
Categories
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2020R1C1C1010611]
Ask authors/readers for more resources
Aqueous zinc-ion batteries are considered the next-generation energy storage devices, offering abundant zinc resources, reliable safety, and high specific capacity. However, their vulnerable cathodes have hindered practical application. This study introduces free-standing manganese oxide on a flexible graphene film as an advanced cathode for aqueous ZIBs, showing superior electrochemical performance and high energy density in the electrolyte solution.
Aqueous zinc-ion batteries (ZIBs) are regarded as the next-generation energy storage devices because they provide an abundant zinc source, reliable safety, eco-friendliness, and high specific capacity. In particular, the ZIBs are desirable because they can overcome the disadvantages of conventional lithium ion batteries (LIBs) such as poor safety and high cost. Nevertheless, the practical application of aqueous ZIBs remains hindered by their vulnerable cathodes which lead to low energy density, fast capacity fading, and unstable long-term stability. Herein, for the first time, free-standing manganese oxide (MnO2) on a flexible graphene film is reported as an advanced cathode for aqueous ZIBs that is suitable for practical application. The resultant novel electrode shows a superior electrochemical performance in the electrolyte solution, including a high energy density of 396 W h kg- 1 at a power density of 90 W kg- 1, and a good capacity retention of 82.7% after up to 300 cycles. More interestingly, the solid-state ZIBs incorporating a gel electrolyte exhibit good electrochemical performance, remarkable safety, flexibility and waterproof properties, thus indicating that this promising candidate can provide new insights into flexible and wearable energy storage devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available