Recently, Dr. Wang Jue, a postdoctoral fellow in the School of Physics and Microelectronics of our school, has made important progress in the research of potassium ion batteries, providing a new solution to the instability of the anode materials of alloyed potassium ion batteries during charging and discharging-the original Bit alloying strategy. Relevant achievements were published in ACS Nano under the title "In-Situ Alloying Strategy for Exceptional Potassium Ion Batteries" (impact factor 13.709).
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Although lithium-ion batteries have relatively high energy density and power density, global lithium resources are few and unevenly distributed, resulting in high cost of lithium-ion batteries. In contrast, potassium resources are widely distributed, low in price, similar in chemical properties to lithium, and have broad application prospects. However, due to the limitation of theoretical capacity, carbon anode materials that have received widespread attention can store less potassium ions and provide lower actual capacity. Alloyed anode materials can be combined with more potassium ions to provide high capacity, but such materials cause huge volume expansion during potassium storage, resulting in poor stability of electrode materials, which is an urgent problem to be solved. Based on this, Dr. Wang Jue and others proposed the in-situ alloying strategy at the atomic level to produce nano-alloy particles with uniform size and uniform element distribution to form a strong synergistic effect between atoms to solve this problem, and analyzed the phase of potassium storage of this material. Evolution.
Schematic diagram of alloying process and in-situ tracking.
Dr. Jue Wang graduated from the University of Alabama, USA, and is mainly engaged in the research of energy storage and solar renewable energy conversion. Since joining the postdoctoral mobile station of Hunan University in October 2017, he has published three high-level papers as first author (co-first author) in internationally renowned academic journals (IF> 10) such as ACS Nano and Advanced Energy Materials.
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