Compositions – Electrically conductive or emissive compositions – Elemental carbon containing
Reexamination Certificate
2007-07-27
2011-11-01
Kopec, Mark (Department: 1766)
Compositions
Electrically conductive or emissive compositions
Elemental carbon containing
C252S510000, C429S231950
Reexamination Certificate
active
08048339
ABSTRACT:
Provided are a porous anode active material, a method of preparing the same, and an anode and a lithium battery employing the same. The porous anode active material includes fine particles of metallic substance capable of forming a lithium alloy; a crystalline carboneous substance; and a porous carboneous material coating and attaching to the fine particles of metallic substance and the crystalline carboneous substance, the porous anode active material having pores exhibiting a bimodal size distribution with two pore diameter peaks as measured by a Barrett-Joyner-Halenda (BJH) pore size distribution from a nitrogen adsorption. The porous anode active material has the pores having a bimodal size distribution, and thus may efficiently remove a stress occurring due to a difference of expansion between a carboneous material and a metallic active material during charging and discharging. Further, the anode electrode and the lithium battery comprising the anode active material have excellent charge/discharge characteristics.
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Im Dong-min
Kim Han-su
Mah Sang-kook
Christie Parker & Hale LLP
Kopec Mark
Samsung SDI & Co., Ltd.
Thomas Jaison
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