Zncl2-Based Activation for Converting Spent Coffee Grounds into a Robust Anode for Li-Ion Batteries

作     者：Vo, Thuan Ngoc Le, Van Thuan Dang, Nguyen Khoa Le, My Loan Phung Nguyen, Van Hoang Tran, Van Man Nguyen, Minh Thu Tran, Nhu Hoa Thi Nguyen, Tuan Loi Kim, Il Tae 

作者机构：Department of Chemical and Biological Engineering Gachon University Gyeonggi-do Seongnam-si13120 Korea Republic of Center for Advanced Chemistry Institute of Research and Development Duy Tan University 03 Quang Trung Da Nang550000 Viet Nam The Faculty of Natural Sciences Duy Tan University 03 Quang Trung Da Nang550000 Viet Nam Tran Phu High School 11 Le Thanh Ton Da Nang550000 Viet Nam Department of Physical Chemistry Faculty of Chemistry VNUHCM University of Science Viet Nam  VNUHCM - University of Science Viet Nam Vietnam National University Ho Chi Minh City Linh Trung Ward Thu Duc District Ho Chi Minh City Viet Nam Faculty of Materials Science and Technology University of Science Ho Chi Minh City Viet Nam Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh City700000 Viet Nam 

出 版 物：《SSRN》 

年 卷 期：2023年

核心收录：

主　　题：Lithium ion batteries 

摘      要：Achieving a net-zero target via a circular economy approach necessitates maximizing the recycling of waste into higher-value materials. In the present study, spent coffee grounds (SCG) from industrial food processing waste are converted into a high-performance anode material used in lithium-ion batteries via one-step carbonization of ZnCl2 at 550°C. The hybrid composites (HCs) are collected after the process contained C- and Zn-based mixed oxides, such as Zn2SiO4 and ZnFe2O4. The content of Zn-based mixed oxides in HCs increases with the initial ZnCl2:SCG mass ratio and reaches its maximum at a ratio of 2:1 wt/wt (HCs_2). The electrochemical performance of the HC-based anodes is proportional to the loaded Zn content when the ZnCl2:SCG mass ratio increases from 0 to 2. The optimized anode (HCs_2) exhibits a charge capacity of 692 mAh g-1 and capacity retention of 86% at the 100th cycle, whereas the corresponding values for HCs_0 anode (without ZnCl2 treatment) are 311 mAh g-1 and 73.3%. The superior electrochemical performance of the optimized anode is attributed to the nanosized Zn2SiO4 and ZnFe2O4, stabilization effect of carbon matrices, and a strategy that increases the proportions of high-capacity components. © 2023, The Authors. All rights reserved.