Type

Journal Article

Authors

Alexey M Glushenkov
Ying Chen
Hongzhou Zhang
Abbas Khalid
Debasis Poddar
Neeraj Sharma
Thrinathreddy Ramireddy
Md Mokhlesur Rahman
Irin Sultana

Subjects

Chemistry

Topics
hybrid lithium ion battery transition metal oxides carbon electrodes high rate materials stability

Understanding Structure-Function Relationship in Hybrid Co3O4-Fe2O3/C Lithium-Ion Battery Electrodes. (2015)

Abstract A range of high-capacity Li-ion anode materials (conversion reactions with lithium) suffer from poor cycling stability and limited high-rate performance. These issues can be addressed through hybridization of multiple nanostructured components in an electrode. Using a Co3O4-Fe2O3/C system as an example, we demonstrate that the cycling stability and rate performance are improved in a hybrid electrode. The hybrid Co3O4-Fe2O3/C electrode exhibits long-term cycling stability (300 cycles) at a moderate current rate with a retained capacity of approximately 700 mAh g(-1). The reversible capacity of the Co3O4-Fe2O3/C electrode is still about 400 mAh g(-1) (above the theoretical capacity of graphite) at a high current rate of ca. 3 A g(-1), whereas Co3O4-Fe2O3, Fe2O3/C, and Co3O4/C electrodes (used as controls) are unable to operate as effectively under identical testing conditions. To understand the structure-function relationship in the hybrid electrode and the reasons for the enhanced cycling stability, we employed a combination of ex situ and in situ techniques. Our results indicate that the improvements in the hybrid electrode originate from the combination of sequential electrochemical activity of the transition metal oxides with an enhanced electronic conductivity provided by percolating carbon chains.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Alexey M Glushenkov, Ying Chen, Hongzhou Zhang, Abbas Khalid, Debasis Poddar, Neeraj Sharma, Thrinathreddy Ramireddy, Md Mokhlesur Rahman, Irin Sultana

Experts in our system

1
Hongzhou Zhang
Trinity College Dublin
Total Publications: 50