LITHIUM ION BATTERY ELECTRODE MATERIAL WITH COMPOSITE FUNCTIONAL COATING

摘要

A method of coating electrode material, for a lithium ion battery, that involves chemically grafting an organic layer to the electrode material. The method includes carbonizing the organic layer to form a doped carbon layer chemically bonded to the electrode material. A dopant included in the carbon layer is adapted to react with harmful material formed in the operation of the lithium ion battery and thereby protect the electrode material. Further, a dopant included in the carbon layer may improve the carbon layer's conductivity. A lithium ion battery that includes an electrode fabricated from electrode material that has doped carbon chemically bonded to the electrode material. A dopant included in the doped carbon is capable of reacting with harmful products formed in the electrolyte of the lithium ion battery during its charging and discharging process. A dopant included in the doped carbon improves electron transfer and thereby improves conductivity of the electrode material and the electrode fabricated from the electrode material.

主权项

1. A method for coating core active material for an electrode of a lithium ion battery, said method comprising:
chemically bonding doped carbon to said core active material, said doped carbon being doped with at least (1) a metal or a metalloid and (2) a non-metal having a valency different from carbon's valency, said chemically bonding comprising:
chemically bonding an organic layer to said core active material; andconverting said organic layer to said doped carbon.