TY - JOUR
AU - Cho, Jaephil
AB - Li-rich materials are considered the most promising for Li-ion battery cathodes, as high energy densities can be achieved. However, because an activation method is lacking for large particles, small particles must be used with large surface areas, a critical drawback that leads to poor long-term energy retention and low volumetric energy densities. Here we propose a new material engineering concept to overcome these difficulties. Our material is designed with 10 μm-sized secondary particles composed of submicron scaled flake-shaped primary particles that decrease the surface area without sacrificing rate capability. A novel activation method then overcomes the previous limits of Li-rich materials with large particles. As a result, we attained high average voltage and capacity retention in turn yielding excellent energy retention of 93% during 600 cycles. This novel and unique approach may furthermore open the door to new material engineering methods for high-performance cathode materials. 
TI - Superior long-term energy retention and volumetric energy density for Li-rich cathode materials.
JO - Nano Letters
DO - 10.1021/nl502980k
DA - 2015-04-22
UR - https://www.deepdyve.com/lp/pubmed/superior-long-term-energy-retention-and-volumetric-energy-density-for-vIh5k0a5v6
SP - 5965
EP - 72
VL - 14
IS - 10
DP - DeepDyve
ER -