Effect of Disorder Induced by Ball Milling on the Electrochemical Performance of Catalytically Graphitized Carbon Xerogel as Anode for Lithium Ion Batteries

Gopalakrishna, K M and Kakunuri, M and Sharma, Chandra Shekhar (2015) Effect of Disorder Induced by Ball Milling on the Electrochemical Performance of Catalytically Graphitized Carbon Xerogel as Anode for Lithium Ion Batteries. ECS Transactions, 66 (8). pp. 41-51. ISSN 1938-5862

Full text not available from this repository. (Request a copy)

Abstract

We have synthesized resorcinol formaldehyde based carbon xerogel (RFCX) by graphitizing it at 1800 °C in the presence of a catalyst. As -synthesized RFCX was then ball milled for different duration to develop a control on it s microstructure as studied in detail using scanning electron microscopy, X-ray diffraction, BET surface area and transmission electron microscopy. Structural characterization revealed that RFCX is an example of hard carbon and with the increase in milling time, there was an increase in its structural disorder further. This increase in structural disorder was then correlated to understand the electrochemical behaviour of RFCX using cyclic voltammetry and galvanostat charge/discharge measurements. RFCX sample ball milled for 4 h showed significant increase in its reversible capacity (3 10 mAh/g) with 99.1% coulombic efficiency after 50 cycles. Further this change in microstructure of RFCX facilitated their use at high C-rate (up to 1 C) with excellent capacity retention. This work paves the way of efficient use of RFCX as an anode material for next generation lithium ion batteries.

[error in script]

IITH Creators: