Open AccessEffect of Activated Carbon Addition on Electrochemical Performance of Li4Ti5O12/Nano Si Composite as Anode Material for LiB
Author(s) -
Nadia Nur Annisa,
Igor Del Gaudio Orlando,
Faizah,
Anne Zulfia Syahrial
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/553/1/012057
Subject(s) - materials science , anode , activated carbon , carbon fibers , electrochemistry , composite number , lithium titanate , chemical engineering , lithium ion battery , battery (electricity) , electrical resistivity and conductivity , nano , composite material , adsorption , chemistry , electrode , organic chemistry , engineering , power (physics) , physics , electrical engineering , quantum mechanics
Lithium titanate (Li 4 Ti 5 O 12 /LTO) is one of the materials being developed as an anode in Li-ion battery. LTO has zero-strain properties that do not volume change during charge and discharge, does not cause SEI, and can be used for the high rate. However, LTO has a weakness such as low electrical conductivity of 10 −13 S/cm and low capacity of 175 mAh/g. Therefore, it needs to be combined with high-capacity materials such as silicon and materials that have high electrical conductivity such as carbon. In this study, the LTO-C/nano-Si composite was made to obtain an anode with high capacity and electrical conductivity. Carbon is added with a variation of 1, 3, and 5 wt% during the sol-gel process, while nano-Si is added by 10 wt% of the total active material ingredient in the slurry making. The carbon added is activated carbon which has previously been activated by using NaOH. Activated carbon is characterized by BET and SEM, while LTO-C/nano-Si composite was characterized by XRD and SEM. For the battery electrochemical performance, EIS, CV, and CD tests are performed. Activated carbon has a surface area of 490,007 m 2 /g. In this study, the optimum result achieved by the addition of 3% activated carbon (LTO-3%C/nano-Si) with 182.87 Ω resistivity and 17.14 mAh/g discharge capacity at 20C.