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1.发明授权公开(公告)号：US11362328B2
公开(公告)日：2022-06-14
申请号：US16631752
申请日：2018-09-29
Inventor： Zhou Jin , Hailong Yu , Xuejie Huang
IPC: H01M4/38 , H01M4/04 , H01M4/36 , H01M10/0525 , H01M4/02
Abstract: The invention provides a composite-coated nano-tin negative electrode material, which comprises a tin-based nanomaterial, a nano-copper layer coated on the surface of the tin-based nanomaterial and a conductive protective layer coated on the surface of the nano-copper layer. The nano-copper layer can inhibit the volume expansion of nano-tin, keep the nano-tin material from cracking, avoid direct contact between nano-tin and electrolyte to form stable SEI and increase the conductivity of the electrode. Coating a conductive layer on the surface of the nano-copper layer can effectively inhibit the oxidation of nano-copper, thus improving its electrochemical performance. The composite-coated nano-tin negative electrode material according to the invention is used as a negative electrode material of a lithium-ion battery, has excellent electrochemical performance, and has potential application prospects in portable mobile devices and electric vehicles.
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公开(公告)号：US11362327B2
公开(公告)日：2022-06-14
申请号：US16500070
申请日：2017-09-05
Inventor： Zhou Jin , Hailong Yu , Xuejie Huang
Abstract: This invention relates to a double layer composite-coated nano-silicon negative electrode material, and its preparation methods and use, the negative electrode material comprising: a silicon-based nanoparticle, a copper layer coated on the surface of the silicon-based nanoparticle, and a conductive protective layer coated on the surface of the copper layer. Nano-copper has superplastic ductility and conductivity, and the prior art has proved that lithium ions can penetrate nano-copper; therefore, the copper coating layer has effects of inhibiting the volume expansion of the silicon-based nanoparticle and keeping the silicon-based nanoparticle from cracking so that direct contact between the silicon-based nanoparticle and an electrolyte is effectively avoided and a stable SEI is formed, and increasing the conductivity of the electrode. The surface of the nano-copper is coated with a further conductive protective layer to effectively inhibit the oxidation of the nano-copper, thereby improving the electrochemical performance.
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3.发明申请公开(公告)号：US20200185711A1
公开(公告)日：2020-06-11
申请号：US16631752
申请日：2018-09-29
Inventor： Zhou Jin , Hailong Yu , Xuejie Huang
IPC: H01M4/38 , H01M10/0525 , H01M4/36 , H01M4/04
Abstract: The invention provides a composite-coated nano-tin negative electrode material, which comprises a tin-based nanomaterial, a nano-copper layer coated on the surface of the tin-based nanomaterial and a conductive protective layer coated on the surface of the nano-copper layer. The nano-copper layer can inhibit the volume expansion of nano-tin, keep the nano-tin material from cracking, avoid direct contact between nano-tin and electrolyte to form stable SRI and increase the conductivity of the electrode. Coating a conductive layer on the surface of the nano-copper layer can effectively inhibit the oxidation of nano-copper, thus improving its electrochemical performance. The composite-coated nano-tin negative electrode material according to the invention is used as a negative electrode material of a lithium-ion battery, has excellent electrochemical performance, and has potential application prospects in portable mobile devices and electric vehicles.
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