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release time:2024-08-08 Hits: Popular:AG11 battery
German new lithium battery research A new breakthrough under the perovskite structure
Today's 2025 button cell battery have a lot of evidence to prove their shortcomings, which has prompted people to consider the use of a plethora of new materials in such devices. When it comes to anodes, the goal is to integrate materials with better charge rates and energy densities than the commonly used graphite, and find safe ways to use lithium without risking dendrites.
Lithium titanate has proven its promise and has some commercial value, but anodes made from this material tend to have lower energy density than graphite and challenges related to cycle life and charge rate.
Lithium titanate batteries are one of many ways to eliminate scarce, expensive and environmentally harmful materials (especially cobalt and nickel) from the energy storage supply chain.
It is understood that so far, such batteries have been limited by the mismatched properties of the anode and cathode, and have tried to overcome these problems by using 3D porous structures and implanting carbon nanofilms into their devices. These are integrated through a series of novel processes, including molecular coupling, freeze drying and pyrolysis.
Scientists led by staff from Karlsruhe Institute of Technology (KIT) have achieved encouraging results using lithium lanthanum titanate anodes (LLTO), which have a perovskite crystal structure.
In experiments, the anode operated at a voltage below 1 V, had a reversible capacity of 225 mAh per gram, and retained 79% of its capacity after 3,000 cycles. "Ultimately, the cell voltage and the energy storage capacity determine the energy density of the battery," said Helmut Ehrenberg, head of KIT's Institute of Applied Materials - Energy Storage Systems. "In the future, LLTO anodes could enable particularly safe and durable high-performance batteries."
The team noted that the performance of their anode was achieved without complex nanoscale engineering. Even with larger particles, LLTO anodes showed better power density and charge rate than the more commonly studied lithium titanate oxide.
The researchers attribute this to LLTO's pseudocapacitive properties, where ions insert and transfer their charge into the active material layer. "Due to the larger particles, LLTO could in principle make electrode production simpler and cheaper," said Ehrenberg.
The team said their work highlights the importance of lithium titanate battery chemistry, adding that they hope to stimulate new research into identifying and developing other new titanium-based anode materials with satisfactory electrochemical properties.
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