Natural graphite ATO-NG1:20 ATO-NG1:10
ATO-NG1:10with carbon coating Natural graphite
ATO-NG1:20 ATO-NG1:10 ATO-NG1:10
with carbon coating
a
b
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Figure 3.9. Rate capabilities (0.2-5 C) of bare natural graphite and ATO-NG electrodes.
Natural graphite ATO-NG1:20 ATO-NG1:10
ATO-NG1:10with carbon coating
64 3.4 Conclusion
In summary, we described a simple process to synthesize ATO-coated graphite particles. The ATO nanoparticles were deposited on the graphite surface via a heat treatment and the surface coverage could be tuned by controlling of the amount of ATO colloidal solution. In order to coat a more uniform ATO layers, the carbon coating process of ATO-NG was introduced using carbon source. The ATO-coated graphite particles considerably improved electrochemical performances, including a high reversible capacity, a superior cycling life, and an excellent rate capability in LIBs, because the ATO nanoparticles on the graphite surface contributed to increase specific capacity and electronic conductivity. This strategy can be extended to other materials to synthesize advanced anode and cathode materials for practical LIB applications.
65 3.5 References
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