The Calcined Soils Can Be Used as Anode Materials for Lithium Ion Batteries

• Published in: International journal of electrochemical science Vol. 13; no. 5; pp. 4967 - 4980
• Main Authors: Ding, Keqiang, Shi, Xiaomi, Wang, Hui, Li, Chenxue, Wang, Wang, Dou, Hongmin, Gao, Xiaojing, Han, Jingwei, Pan, Junqing
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2018
• Subjects: anode materials; calcination; calcination temperature; lithium ions battery; soil; anode materials; lithium ions battery; soil; calcination temperature; calcination
• ISSN: 1452-3981; 1452-3981
• DOI: 10.20964/2018.05.34

An interesting finding, that the calcined soils can be used as the anode materials for lithium ion batteries (LIBs), is issued for the first time in this work. In the present work, the soils were respectively sintered at 200°C, 400°C, 600°C and 800°C for 2 h, leading to the formation of material a, b, c and d. All the prepared materials were carefully characterized by XRD which indicated that SiO2 was the main component in all resultant materials. SEM images strongly indicated that the morphologies of the resultant materials were closely related to the calcination temperature, and when the calcination temperature was increased from 200°C to 800°C, the lumpy particles were converted into plate-like particles. The consequences of the electrochemical measurements documented that all the prepared materials could deliver a discharge capacity. Interestingly, the discharge capacity of material c was maintained at about 30 mAh g-1 under the current density of 100 mA g-1 after 20 cycles. Although the discharge capacity reported in this work was lower when compared to the currently reported anode materials, this interesting finding was very meaningful to the development of anode materials, owing to the abundant resources of soil and the rather lower preparation cost as well as the very simple preparation process.