화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.164, No.9, A2012-A2016, 2017
Spontaneous Formation of Interwoven Porous Channels in Hard-Wood- Based Hard-Carbon for High-Performance Anodes in Potassium-Ion Batteries
For the first time we report that hard-wood (oak) can spontaneously create interconnected channels of mu m to nm in diameter during carbonization at an optimized temperature (1100 degrees C). These microstructural features have never been found in other hardcarbons without the use of additives. When compared with sucrose-based hard-carbon (SHC), oak-based hard-carbon (OHC) shows much higher charge-storage capability (ca. 223 vs. 112 mAh.g(-1) t 20 mA.g(-1)) and excellent stability (fading rate of 0.04 vs. 0.08% .cycle(-1)) as an anode in potassium-ion batteries. The high performance of OHC mainly results from interwoven nanoporous channels, which lead to facile charge transfer and fast K+-diffusion. (C)17 The Electrochemical Society.