Lithium Secondary Battery and Method of Preparing Anode for Lithium Secondary Battery
AssigneeSK Innovation Co., Ltd.
InventorsJong Hyuk Lee, Dock Young Yoon, Hee Gyoung Kang
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Abstract
A lithium secondary battery according to exemplary embodiments includes a cathode, a separation layer, and an anode facing the cathode with the separation layer interposed therebetween. The anode includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer includes an anode active material and a conductive additive. The conductive additive includes an expandable graphite having a particle diameter of 10 μm or less.
Claims14
A lithium secondary battery, comprising:
- a cathode;
- a separation layer;
- and
- an anode facing the cathode with the separation layer interposed therebetween, wherein the anode comprises:
- an anode current collector;
- and
- an anode active material layer formed on the anode current collector, the anode active material layer including an anode active material and a conductive additive,
- wherein the conductive additive includes an expandable graphite having a particle diameter of 10 μm or less.
A method of fabricating an anode for a lithium secondary battery, comprising:
- grinding a graphite particle including natural graphite or artificial graphite to have a particle diameter of 10 μm or less;
- acid-treating the grinded graphite particle;
- washing and drying the acid-treated graphite particle to prepare an expandable graphite;
- mixing the expandable graphite with an anode active material to prepare an anode slurry;
- and
- coating the anode slurry on a current collector to form an anode active material layer.
Dependencies are inferred from the claim text.