Novel anode breakthrough to speed up battery charging
The anode material provides more than two times the capacity of hard carbon, retains its charge capacity even at high current rates, and exhibits a charge and discharge time of 10 minutes. This would allow fast charging of NIBs in the future, which will enable utilization in applications such as electric vehicles. In addition to the excellent rate capability, the material also shows stable cycle performance, with capacity retention of more than 95% after 50 cycles.
The novel anode, which was invented by Professor Ovadia Lev, from the Center for Nanoscience and Nanotechnology at the Casali Institute of Applied Chemistry at the Hebrew University, together with colleagues from Singapore’s Nanyang Technological University (NTU) and The Russian Academy of Science, Moscow, is based on coating graphene with antimony sulphide (stibnite) nanoparticles.
The novel anode is based on a new coating technology, also invented by Prof. Lev together with Dr. Petr Prikhodchenko, which enables coating of graphenes with a thin film of nanoparticles at low cost. Prof. Lev and Dr. Denis Y.W. Yu, along with Dr. Sudip K Batabyal from the Energy Research Institute @ Nanyang Technological University (ERI@N) and their teams optimized and tested the battery’s performance. Tests conducted at NTU showed that the novel composite material performs well as an anode for the new sodium-ion batteries.
"The battery market in the US alone is estimated at $14 billion, and is projected to grow to $17 billion by 2017. The novel anode will no doubt help propel the integration of NIBs into this market, and Yissum is now looking for potential partners for further development and commercialization of this invention," explained Yaacov Michlin, CEO of Yissum.
The findings have been published in the publication Nature Communications.
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