[이동현상론] Carbon Anode Materials for Lithium Ion Batteries

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응급약물 레포트

소개글

[이동현상론] Carbon Anode Materials for Lithium Ion Batteries에 대한 자료입니다.

1.Problems of carbon anode lithium ion battery
2.Kinds of carbons
a. Graphite
-Coating by conductive materials
-Advantages of Mild Oxidation of Graphite
b. Other Carbons
-Carbon & Si composite
-Soft and Hard Carbon
-CNT
3.Conclusion
4.Proposal
5.Reference

본문내용

Graphite
Stacked graphene layers, crystalline.

0.335 nm spacing betwwen planes.

About 10% volume expansion upon
Li intercalaion

Theoretical maximum capacity is
372mAl/g(LiC6)

Coating by Conductive Materials

The major effects and advantages

No classical binder is required to prepare mechanically and electrochemically stable anodes.

Irreversible capacity in the first cycle is decreased

Example

Polythiophene,
Polypyrrole,
Polyaniline.

Coating by Conductive Materials
There can be carbons which are not contacted with conducting additives.

These carbons only occupies volume. ‘dead volume’

Stable conductivity can be achieved by coating

Advantages of Mild Oxidation of Graphite

What happens to Graphite?
Nanochannels or micropores are made.

Effects of Mild Oxidation.
Micropores acts as ‘reservoirs’ for lithium ions storage.

Prevent the graphite anode from expanding by lithium ion intercalation

Si has theoretical capacity of 4200mAh/g

Due to it’s large volume change, pulverization can be occurred.

Silicon has high-capacity but poor cycle stability
Carbon has low-capacity but good cycle stability
So silicon/carbon composites can have higher capacity than single carbon anode,
and better cycle stability than single silicon anode.

참고문헌

[1] copyright © Automotive Energy Supply Corporation.2007

[2] Trends of R&D on Materials for High-power and Large-capacity Lithium-ion Batteries for Vehicles Applications NCE & TECHNOLOGY TRENDS, July 2010 , Hiroshi Kawamoto et al.

[3] Development and implementation of a high temperature electrochemical cell for lithium batteries Electrochemistry Communications David Muñoz-Rojasa et al.

[4]Study of lithium insertion in hard carbon made from cotton wool
Journal of Power Sources 76(1998) 153~158 Emanuel Peled et al.

[5] http://hanyangocw.hanyang.ac.kr/ocw/fusion-materials

[6] Kyomin Shina, Dae-Jin Parka, Hyung-Seok Lima, Yang-Kook Suna, Kyung-Do Suha, 「Synthesis of silicon/carbon, multi-core/shell microspheres using solution polymerization for a high performance Li ion battery」, Electrochimica Acta 58 (2011) 578– 582

[7] A review of application of carbon nanotubes for lithium ion battery
anode material Charles de las Casas, Wenzhi Li

[8] Y.P. Wu, E. Rahm, R. Hozle, 「Carbon anode materials for lithium ion batteries」, Journal of Power Sources 114 (2003) 228~236.

[9] Mary L. Patterson, 「Anode materials for lithium ion batteries」, November 13 (2009).

#이동현상론 #Ion #Lithium #Carbon

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