Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 17, Pages 24699-24706Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.05.192
Keywords
3D printing; Structured electrode; Cu2Se; Zinc ion; Mechanical strength
Categories
Funding
- National Nature Science Foundation of China [52072306, 51772246]
- National Defense Basic Scientific Research Program of China [JCKYS2019607001]
- Fundamental Research Funds for the Central Universities [3102019PJ008, 3102018jcc002]
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A high-performance self-supporting SiOC@Cu2Se 3D cathode was fabricated and applied in aqueous zinc-ion batteries, demonstrating high compressive strength and toughness, as well as excellent specific capacity and deformation resistance.
Zinc-ion batteries have attracted significant attention for practical energy storage because of their uniqueness in terms of high capacity, safety and low cost. However, due to the instability of electrodes, large-scale practical applications are challenging. 3D electrodes with high porosity and specific surface area provide an opportunity to solve these problems, increasing their stability, energy density and mechanical properties. Herein, an ultrapressure-resistant self-supporting SiOC@Cu2Se 3D cathode was fabricated and applied in aqueous zinc-ion batteries. The battery with the as-obtained cathode delivers a maximum compressive strength of 89.23 MPa and a toughness up to 16453 kJ m- 3. In addition, the structural electrodes possess a specific capacity of 2.9 mWh cm-3 at a current density of 4.88 mA cm-3, demonstrating excellent deformation resistance and high specific capacity. Ex situ XRD and EDS show an interesting Cu2Se to Cu2O transformation during the first charge and discharge cycle. As expected, the electrode prepared in this paper provides a novel idea to manufacture 3D structured zinc-ion batteries with high specific capacity and excellent deformation resistance, fulfilling the demand for energy storage in astronautic industries and space exploration facing shock and high-pressure environments.
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