Reducing P-O bond covalency in polyanionic groups to increase the intrinsic electronic conductivity in sodium positive electrodes

J Jiawei Luo (State Key Laboratory of Quantum Functional Materials, School of Physical Science and Technology) Y Yuhang Liu (School of Materials Science and Engineering) J Jingchao Zhang (College of Ecology and Environment, Chengdu University of Technology) Z Zhedong Liu Z Zhaoxin Guo K Kunyan Qian Z Zekun Li (Department of Chemistry) P Pengfei Huang C Chunying Wang J Jianrong Zeng (Shanghai Synchrotron Radiation Facility) R Rui Liu Y Yanan Chen J Jia Ding (School of Materials Science and Engineering, Tianjin University, Tianjin, China.) W Wenbin Hu