en.Wedoany.com Reported - A team led by Professor Sun Jie from Shaanxi Normal University in China has developed a novel titanium-chromium nitride solid-solution catalyst that enables lithium-sulfur batteries to retain 93% of their capacity after 600 charge-discharge cycles. The catalyst is designed to capture and rapidly convert lithium polysulfides, suppressing the shuttle effect that causes battery capacity decay, thereby offering a new approach for the commercial application of lithium-sulfur batteries.

Professor Sun Jie stated: "By continuously adjusting the composition in the TixCr1-xN solid solution at the atomic scale, we achieved precise control over the material's electronic structure." The catalyst performs best at a titanium-to-chromium atomic ratio of 1:2, exhibiting stronger polysulfide adsorption capacity and faster charge transfer compared to pure TiN or CrN, significantly enhancing the stability and reaction kinetics of lithium-sulfur batteries.

Performance tests show that the electrode delivers a specific capacity of 801 mAh g-1 at a 2 C rate, with a capacity decay rate of only 0.012% per cycle after 600 cycles. The research, published in the journal Nano Research, is expected to advance the application of lithium-sulfur batteries in electric vehicles and large-scale energy storage.

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