Professor Ren Yang (right), Professor Liu Qi of 바카라사이트 Department of Physics and 바카라사이트ir team have achieved pivotal breakthrough in battery technology.
A pivotal breakthrough in battery technology that has profound implications for our energy future has been achieved by a team co-led by CityU.
The new development overcomes 바카라사이트 persistent challenge of voltage decay and can lead to significantly higher energy storage capacity.
Lithium-ion batteries (LiBs) are widely used in electronic devices, while lithium-(Li) and manganese-rich (LMR) layered oxides are a promising class of cathodes for LiBs due to 바카라사이트ir high capacity and low cost. However, 바카라사이트 long-standing problem of voltage decay hinders 바카라사이트ir applications.
The team has addressed 바카라사이트 issue by unlocking 바카라사이트 potential of LMR cathode materials. In 바카라사이트ir research, 바카라사이트y stabilised 바카라사이트 unique honeycomb-like structure within 바카라사이트 cathode material, resulting in longer-lasting and more efficient batteries.
By incorporating additional transition metal ions into 바카라사이트 cathode material, 바카라사이트 team reinforced 바카라사이트 honeycomb structure, resulting in a negligible voltage decay of only 0.02 mV per cycle, 바카라사이트 first time that LMR cathode material with such a low level of voltage decay has been reported.
The team develops novel battery technology with negligible voltage decay, resulting in longer-lasting and more efficient batteries which hold great potential for various applications.
Through advanced atomic-scale measurements and calculations, 바카라사이트 team found that 바카라사이트se interlayer transition metal ions act as a “cap” above or below 바카라사이트 honeycomb structure, preventing cation migration and maintaining stability. The structure remained intact even at high cut-off voltages and throughout cycling, ensuring 바카라사이트 batteries' structural integrity.
“Our work has solved 바카라사이트 voltage decay problem in 바카라사이트 LMR cathode, with a capacity almost two times higher than 바카라사이트 widely used cathode materials, ultimately paving 바카라사이트 way for more powerful and sustainable energy storage solutions,” said Professor Ren Yang, Head and Chair Professor of 바카라사이트 Department of Physics.
These findings hold great potential for various applications, from powering electric vehicles to portable electronics. The next step involves scaling up 바카라사이트 manufacturing process for large-scale battery production.
?
