Production of the C/TiO_(2)composite with a high-performance electrochemical property from titanium-rich sludge via in-situ C coating  

作　　者：Hualong Wu Yanxia Zhao Jiexi Wang Xiaoyan Li Kaimin Shih Xuguang Li Wei Liu 

机构地区：[1]School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China [2]State Key Lab of Physical Chemistry of Solid Surface,Collaborative Innovation Center of Chemistry for Energy Materials,College of Materials,Xiamen University,Xiamen 361005,China [3]School of Metallurgy and Environment,Central South University,Changsha 410083,China [4]Department of Civil Engineering,The University of Hong Kong,Pokfulam,Hong Kong,China [5]Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Journal of Environmental Sciences》2024年第3期131-143,共13页环境科学学报（英文版）

基　　金：supported by grants from the Taishan Scholars Young Experts Program (No.tsqn202103080);The National Natural Science Foundation of China (No.51978311);the Project of Shandong Province Higher Educational Youth Innovation Science and Technology Program (No.2021KJ043);the Research Grants Council of the Hong Kong SAR Government (Nos.17210219 and T21-711/16-R)。

摘　　要：Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in China.The emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge production.Management and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental remediation.The present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO_(2)composites as the anode materials for lithium-ion batteries(LIBs).It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO_(2)was evaluated for LIBs.The experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO_(2)composites with a high specific surface area,stable structural integrity,and excellent electrochemical properties that would facilitate Li+diffusion in long-term LIBs usage.The C/TiO_(2)composites calcinated from the polytitanium sulfate-coagulated sludge at 800℃(N_(2))exhibited the best electrochemical performance during the cycling tests(601 m Ah/g at 100 m A/g after 200 cycles).The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO_(2)composites for energy storage applications.This study provides a new way for the management and reuse of Ti-loaded waste-sludge.

关 键 词：Sludge recovery Ti-loaded sludge In-situ coating Lithium-ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动] X703[环境科学与工程—环境工程]