TY  - JOUR
AU  - Xie, Yangyang
AU  - Hu, Junxian
AU  - Han, Zexun
AU  - Fan, Hailin
AU  - Xu, Jingyu
AU  - Lai, Yanqing
AU  - Zhang, Zhian
PY  - 2020
TI  - Ultra-stable K metal anode enabled by oxygen-rich carbon cloth
JO  - Nano Research
SN  - 1998-0124
SP  - 3137
EP  - 3141
VL  - 13
IS  - 11
AB  - The K metal batteries are emerged as promising alternatives beyond commercialized Li-ion batteries. However, suppressing uncontrolled dendrite is crucial to the accomplishment of K metal batteries. Herein, an oxygen-rich treated carbon cloth (TCC) has been designed as the K plating host to guide K homogeneous nucleation and suppress the dendrite growth. Both density function theory calculations and experimental results demonstrate that abundant oxygen functional groups as K-philic sites on TCC can guide K nucleation and deposition homogeneously. As a result, the TCC electrode exhibits an ultra-long-life over 800 cycles at high current density of 3.0 mA·cm-2 for 3.0 mA·h·cm-2. Furthermore, the symmetrical cells can run stably for 2,000 h with low over-potential less than 20 mV at 1.0 mA·cm-2 for 1.0 mA·h·cm-2. Even at a higher current of 5.0 mA·cm-2, the TCC electrode can still stably cycle for 1,400 h.
UR  - https://doi.org/10.1007/s12274-020-2984-5
DO  - 10.1007/s12274-020-2984-5