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Aqueous Rechargeable Alkaline CoxNi2-xS2/TiO2 Battery
Jilei Liu1,2,3, Jin Wang1,4, Zhiliang Ku1
1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.
ACS Nano
|November 24, 2015
Summary
A new aqueous rechargeable battery using cobalt-nickel sulfide and titanium dioxide electrodes offers high energy density and safety. This promising battery technology is suitable for large-scale energy storage applications.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Next-generation energy storage demands systems with high energy density, safety, and reliability.
- Aqueous rechargeable batteries offer potential for safer and more sustainable energy storage solutions.
Purpose of the Study:
- To design and evaluate a novel aqueous rechargeable alkaline battery system.
- To integrate reversible electrode processes for enhanced electrochemical performance.
Main Methods:
- Fabrication of a CoxNi2-xS2 cathode and TiO2 anode for an aqueous battery.
- Electrochemical characterization including charge/discharge cycling and energy/power density measurements.
- Evaluation of cycling stability and volumetric energy density.
Main Results:
- The CoxNi2-xS2 // TiO2 battery achieved high energy density (83.7 Wh/kg) and power density (609 W/kg).
- Demonstrated good cycling stability with 75.2% capacity retention after 1000 cycles.
- Attained a volumetric energy density of 21 Wh/l, comparable to thin-film batteries.
Conclusions:
- The developed hybrid aqueous battery system enriches existing rechargeable lithium-ion battery chemistry.
- This battery technology shows promise for large-scale energy storage due to its performance and design.
- The unique battery and hierarchical electrode design contribute to its high energy density and stability.
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