I La

I La

CATHODE MATERIALS

Pl-114

LiCo0

₂

Nanoparticle Fibers as High Power Lithium Ion Battery Cathodes Dong In Choi\ Gi Beom Han\

Dong Jin Lee\ Jung Ki Park

¹,2

and Jang Wook Choi

²

lDepartment ofChemicai and Bionwlecular Engineering, Korea Advanced Institute Science and DClf!jeon, Korea,

,Vf)'/lllntP

School

(lVCU) ,

Korea

Advanced Institute ofScience and Technology, Korea

Since first commercialization of Lithium Ion Batteries (LIBs) in 1991, there had been lots of studies to improve the of LIBs for p011abie electronics. However. there are upcoming new L1Bs markets such as electric vehicle and hybrid electric vehicle, which need high power performance of LiBs. Theretore. research direction has been changed to meet such a new demand,

In power performance of LIEs can be high surface area to the cathode materials. In with this. various

such as nanoparticles I, nanorods². have been studied. In order to syl1lhesize a large amount of cathode active material, nanopartieles would be the most suitable option. Even though nanoparticles are the best choice for scalable production, they usually tend to agglomerate with conducting agent and binder when they are mixed and cast onto current collector, which needs to be challenged.

In this work, we COll ld reduce of nanoparticle,type active materials structuring them to form nanopal1icle fiber structure by cotton as a three-dimensional template. liCo02 was chosen as

a

cathode material in this work.

References

[IJ X. Zhou, F. Wang, Y. Zhu. Z. Liu. J. Mater.

Chem. 21 (2011) 3353-3358

[2] D. K. Kim, P. Muralidharan, H. W. Lee, R. Ruffo, Y. Yang. C. K. Chan, H. Peng, R. A. Huggins. Y.

Cui, Nano Lett. 8 (2008) 3948-3952

[3J H. -W. Lee. P. Muralidharan, R. Ruffo, C. M.

Mari. Y. Cui, D. K. Kim, Nano lett. 10 (2010) 3852­

Pl-115

Electrochemical Characteristics of

Hizn

Energy Density Lithium Ion Battery

u'inl LiNi().6Co<l.2Mno.20lLiMn().8Feo.2PO~

bl,,;::

j

as Cathode Materials Gvoung Rin Choi, Nam \Von Kim.

Young -Hong Kim and Seong Gyu Cr.

EIG Ltd., CheonGn. Korea

·,·p,mfl.nfl to

The cathode materials of lithium-ion intensely studied in the transition m~::.

of layered structure. Recently, intensiH'

c='=·­

been directed towards the develo;':~'=

LiNio6Co(12iv1no20z, The first discharg=

capacity is more than 180 mAh/g in the ~1,':

cycles when being charged to 4.6 V (\S Since Padhi et al. introduced LiMP04 (\[

cathode materials in lithium-ion battC'l~.

LiFeP04 has attracted considerable atter::

power and thermal

Recently in the il1dustry, there are l"P(·"l:t·~",

high energy density lithium-ion battcn For making High Secifie Energy c;::ll needed cathode material which has but it also has a problem that reducing the Thus, in this study for making high S~';~.

with high safety cell, blend high material UNio(,Coo2Mno202 and hig::

Submicron-sized carboncoated li\!J:

use it as cathode electrod. Prjsl11':::~

packaging was employed to build cell with a dimension of 7.5 111m (T, ,\;

X 221 mm (l). liNi"6Coo.2Ml1o:0: L',' was utilized as the main cathode mate:

modified graphite was used Result of cell produce, shows (21 403Wh/l) and produce

L()3()T·1

(1 JObl! !';~oo saoa 12000 1tlOOO 18a>]0 Capacit>/ (mAh'

Figure I, Rate capability of the' Li\1no gFeluP04 composite ed energy density.

References

[IJ ZHONG S. K. L.Wei. Ll Y H..

TANG X., Trans Non. Met. SOC.

[2J Z Li, D Zhang, and F Yanf; , 2435.

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