Potato derived biomass porous carbon as anode for potassium ion batteries

• DOI: 10.1016/j.electacta.2018.10.036
• Publication Date: 2018-10-10T18:57:07Z
• Authors: Wei Cao; Erjin Zhang; Jue Wang; Zhaomeng Liu; Junmin Ge; Xinzhi Yu; Hongguan Yang; Bingan Lu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract Biomaterials play a significant role in energy storage devices owing to their renewable, inexpensive and eco-friendly peculiarity. In this study, potato biomass porous carbon (PBPC), which was fabricated by a facile two-step carbonization, was used as the anode material for potassium-ion batteries (KIBs). The crystal structure and mesoporous morphology of the carbon derivative at various carbonation temperatures are fully investigated. The electrochemical performance of PBPC electrodes is evaluated, presenting a high reversible specific capacity (248 mA h g−1 at 100 mA g−1), an excellent rate performance (152 mA h g−1 at 1000 mA g−1) and a superior cycle stability (almost no capacity decay after 400 cycles at a current density of 500 mA g−1 with a Coulombic efficiency about 100%). The superior electrochemical performance is mainly attributed to the uniformly distributed mesopores on PBPC electrode which facilitate the electrolyte transportation and diffusion. This work provides a simple and novel strategy to construct porous carbon as high-performance anode materials for KIBs through a sustainable and environment-friendly way.