AI Article Synopsis
- The text discusses the significance of compensating for the loss of lithium in Li-ion batteries to enhance their performance and lifespan.
- A novel prelithiation agent, (Li Co □ ) O (CLO), is developed by implanting cobalt into lithium oxide, which improves conductivity and allows better lithium mobility.
- When used with a LiCoO cathode, this agent releases extra lithium to offset losses, resulting in a high-performing battery with impressive energy density and long cycle life.
Article Abstract
Compensating the irreversible loss of limited active lithium (Li) is essentially important for improving the energy-density and cycle-life of practical Li-ion battery full-cell, especially after employing high-capacity but low initial coulombic efficiency anode candidates. Introducing prelithiation agent can provide additional Li source for such compensation. Herein, we precisely implant trace Co (extracted from transition metal oxide) into the Li site of Li O, obtaining (Li Co □ ) O (CLO) cathode prelithiation agent. The synergistic formation of Li vacancies and Co-derived catalysis efficiently enhance the inherent conductivity and weaken the Li-O interaction of Li O, which facilitates its anionic oxidation to peroxo/superoxo species and gaseous O , achieving 1642.7 mAh/g prelithiation capacity (≈980 mAh/g for prelithiation agent). Coupled 6.5 wt % CLO-based prelithiation agent with LiCoO cathode, substantial additional Li source stored within CLO is efficiently released to compensate the Li consumption on the SiO/C anode, achieving 270 Wh/kg pouch-type full-cell with 92 % capacity retention after 1000 cycles.
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| http://dx.doi.org/10.1002/anie.202316112 | DOI Listing |
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