In:
ChemElectroChem, Wiley, Vol. 4, No. 10 ( 2017-10), p. 2626-2633
Abstract:
We report a microwave‐assisted solvothermal process for the preparation of magnetite (Fe 3 O 4 , ca. 5 nm)‐anchored reduced graphene oxide (rGO). It has been examined as a prospective conversion‐type negative electrode for multiple energy storage applications, such as Li‐ion batteries (LIBs) and Li‐ion capacitors (LICs). A LiFePO 4 /Fe 3 O 4 ‐rGO cell is constructed and capable of delivering an energy density of approximately 139 Wh kg −1 with a notable cyclability (ca. 76 %) after 500 cycles. Prior to the fabrication of a LIB, the Fe 3 O 4 ‐rGO is electrochemically pretreated to eliminate the irreversible capacity loss. In addition to the LIB, a high‐energy LIC is also fabricated by using the pre‐lithiated Fe 3 O 4 ‐rGO composite as the anode and commercial activated carbon as the cathode. This LIC registered a maximum energy density of approximately 114 Wh kg −1 with good cyclability. For both the LIB and LIC, the mass loading between the electrodes was adjusted based on the performance with metallic Li. The improved electrochemical performance of Fe 3 O 4 ‐rGO over existing materials is a promising development in the quest for novel, fast, low cost, and efficient energy storage systems without compromising the eco‐friendliness
Type of Medium:
Online Resource
ISSN:
2196-0216
,
2196-0216
DOI:
10.1002/celc.201700484
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2724978-5