Biomass‐Derived Carbon with Heavy Doping for Anode of Potassium Ion Batteries
Abstract
ABSTRACT The potassium‐ion battery (PIB) is anticipated to be a cost‐effective candidate for large‐scale energy storage for the green power grid. For PIB anodes, carbon is promising owing to its conductivity and abundance. Yet, the insufficient cycle life and rate performance of the carbon anode remain the bottleneck limiting PIBs, stemming from the mismatch between the narrower graphitic interlayer spacing and the larger radius of potassium. Herein, a large number of heteroatoms (18.2 at%) are incorporated into a biomass‐derived carbon. The synthesized carbon material is thus endowed with improved interlayer spacing as well as active sites and mesoporous structures. These attributes collectively contribute to outstanding cycle life (18 000 cycles) and rate capability (260 mAh g −1 at 20 A g −1 ), making it a promising candidate for PIBs for grid‐oriented energy storage.
Article Details
Authors (13)
Lei Gao
Jinjue Zeng
National Laboratory of Solid State Microstructures (NLSSM) Collaborative Innovation Center of Advanced Microstructures Jiangsu Provincial Laboratory For Nanotechnology College of Engineering and Applied Sciences Nanjing University Nanjing China
Xun Ge
Tian Gao
State Key Laboratory of Special Materials Surface Engineering, School of Materials Science and Engineering
Yue Wang
Zhipeng Sun
State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, Agronomy College, Henan Agricultural University
Dingfei Deng
National Laboratory of Solid State Microstructures (NLSSM), Collaborative Innovation Center of Advanced Microstructures, Jiangsu Provincial Laboratory for Nanotechnology, College of Engineering and Applied Sciences Nanjing University Nanjing China
Yuyan Qiu
National Laboratory of Solid State Microstructures (NLSSM), Collaborative Innovation Center of Advanced Microstructures, Jiangsu Provincial Laboratory for Nanotechnology, College of Engineering and Applied Sciences Nanjing University Nanjing China
Lei Wang
Xiangfen Jiang
State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China
Yoshio Bando
Australian Institute for Innovative Materials University of Wollongong Wollongong New South Wales Australia
Lijun Yang
Ballard Power Systems Inc.
Xuebin Wang