Abstract
Anode materials providing a high specific capacity with a high cycling performance are one of the key parameters for lithium ion batteries’ (LIBs) applications. Herein, a high-capacity NiFe2O4(NFO) film anode is prepared by E-beam evaporation, and the effect of the heat treatment is studied on the microstructure and electrochemical properties of LIBs. The NiFe2O4 film annealed at 800 °C (NFO-800) showed a highly crystallized structure and different surface morphologies when compared to the electrode annealed at a lower temperature (NFO-600, NFO-700). In the electrochemical measurements, the high specific capacity (1804 mA g−1) and capacity retention ratio (95%) after 100 cycles were also achieved by the NFO-800 electrode. The main reason for the good electrochemical performance of the NFO-800 electrode is a high structure integrity, which could improve the cycle stability with a high discharge capacity. The NiFe2O4 electrode with an annealing process could be further proposed as an alternative ferrite material.
Highlights
Ever growing concerns of energy consumption are one of the important issues in modern society [1]
To have a high performance in an lithium ion batteries’ (LIBs), it is necessary to design optimized anode materials with a high capacity and long cycle stability. These requirements can be fulfilled with an anode electrode development with a higher specific capacity than commercial anode material such as graphite (372 mAh g−1 )
This prevents them from being practical anode materials for LIBs
Summary
Ever growing concerns of energy consumption are one of the important issues in modern society [1]. To have a high performance in an LIB, it is necessary to design optimized anode materials with a high capacity and long cycle stability. These requirements can be fulfilled with an anode electrode development with a higher specific capacity than commercial anode material such as graphite (372 mAh g−1 ). Despite of advantages of NiFe2 O4 , the volume expansion of the electrode during the charge-discharge process resulted in a poor cycle performance [3] As a result, this prevents them from being practical anode materials for LIBs (lithium ion batteries’). Various strategies have been proposed to overcome the above obstacles
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