Shanghai scientists have developed a rechargeable calcium-based battery, which they say can offer a cheaper and more sustainable alternative to the most widely used lithium-ion cells.
The functioning voltage, capacity, and energy density of a battery heavily rely on the crucial contribution of electrodes. During the charging process of calcium batteries, calcium ions transfer from the cathode through electrolyte to the anode, where they deposit.
Shanghai scientists have developed a rechargeable calcium-based battery, which they say can offer a cheaper and more sustainable alternative to the most widely used lithium-ion cells.
A paper about the research by a team of scientists from Fudan University in Shanghai was published on the website of the United Kingdom-based journal Nature on Feb 7. The abundance of calcium means the battery system has broad prospects in future energy applications, the researchers said.
"Although a certain gap remains between 700 times — the number of times that the proposed calcium-based batteries are able to charge and discharge — and that regarding the commercial lithium-ion batteries, which can be up to 3,000 times, the performance of our calcium-oxygen batteries showed the potential to be put into practical use," Ye said.
The key challenge for rechargeable Ca batteries originates from the severe passivation of the calcium metal anode in electrolyte solutions. Here, the authors demonstrate the feasibility and elucidate the electrochemical properties of calcium-tin (Ca–Sn) alloy anodes for rechargeable Ca batteries.
In their research, the calcium-based batteries were also made into flexible battery textiles, providing new insights into the development of flexible batteries. Chinese President Xi Jinping spoke with U.S. President Joe Biden on the phone Tuesday at the request of the latter.
Shanghai scientists have developed a rechargeable calcium-based battery, which they say can offer a cheaper and more sustainable alternative to the most widely used lithium-ion cells.
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