From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries  

作　　者：Zhonghua Lu Jun Shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang Tao Wei Shoudong Xu 

机构地区：[1]College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China [2]College of Chemistry,Taiyuan University of Technology,Taiyuan 030024,China [3]School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China [4]School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212003,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第2期464-475,共12页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Research Project Supported by Shanxi Scholarship Council of China(No.2022-049);the Natural Science Foundation of Shanxi Province,China(No.20210302123167)。

摘　　要：Carbon materials are widely recognized as highly promising electrode materials for various energy storage system applications.Coal tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable world.In this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances assessment.Based on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were obtained.Furthermore,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of CTRCs.Results indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”mechanism.This work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关 键 词：coal tar residue carbon materials ANODE potassium-ion batteries high value-added 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工]