Accordion-Like Carbon with High Nitrogen Doping for Fast and Stable K Ion Storage

W.L.Z., M.L.S., and J.Y. contributed equally to this work. The authors acknowledge the financial support from King Abdullah University of Technology (KAUST), the financial support from the National Key Research and Development Plan (NO. 2018YFB1501503), the Research and Development Program in Key Fields of Guangdong Province (NO. 2020B1111380002), and the National Natural Science Foundation of China (No. 22108044). W.L.Z. acknowledges the financial support from the Guangdong Provincial Key Laboratory of Plant Resources Biorefinery (No. 2021GDKLPRB07, No. 2021GDKLPRB-K06).