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公开(公告)号：US20190326589A1
公开(公告)日：2019-10-24
申请号：US16311687
申请日：2017-11-17
发明人： Kam Piu Ho , Ranshi Wang , Peihua Shen , Yingkai Jiang
IPC分类号： H01M4/1393 , H01M4/133 , H01M4/134 , H01M4/1395 , H01M4/36 , H01M4/62
摘要： Provided herein is a method of preparing anode slurries of lithium-ion batteries. The method disclosed herein comprises a step of dispersing a silicon-based material (2) in a solvent containing a porous carbon aerogel (1). This step allows the silicon-based material (2) to diffuse into and reside in the pores (3) of the porous carbon aerogel (1). The pores (3) provide sufficient space for the expansion of the silicon-based material (2) during the intercalation of lithium ions. Cracking of the silicon-containing layer is avoided.
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公开(公告)号：US20190260011A1
公开(公告)日：2019-08-22
申请号：US16314393
申请日：2017-11-02
发明人： Kam Piu Ho , Ranshi Wang , Peihua Shen , Yingkai Jiang
IPC分类号： H01M4/1395 , H01M4/1393 , H01M4/62 , H01M10/0525
摘要： Provided herein is a method of preparing anode slurries of lithium-ion batteries. The silicon-based material is uniformly dispersed prior to mixing with other components of the anode slurry. The method disclosed herein is capable of avoiding agglomeration of nano-sized silicon-based material and effectively dispersing the nano-sized silicon-based material uniformly in anode slurries. Anodes coated with the anode slurries disclosed herein also show an improvement in the electrical conductivity.
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公开(公告)号：US20190157682A1
公开(公告)日：2019-05-23
申请号：US16313884
申请日：2017-11-17
发明人： Kam Piu Ho , Ranshi Wang , Peihua Shen , Yingkai Jiang
IPC分类号： H01M4/62 , H01M4/1391 , H01M4/36 , H01M4/38 , H01M10/0525 , H01M4/1393 , H01M4/1395
摘要： Provided herein is an anode slurry for lithium-ion batteries, comprising a silicon-based material, a porous carbon aerogel, a binder material, a carbon active material, and a solvent, wherein the porous carbon aerogel has an average pore size from about 80 nm to about 500 nm. The porous carbon aerogel in the anode slurry disclosed herein provides sufficient space for expansion of the silicon-based material during intercalation of lithium ions. Cracking of the silicon-containing anode layer is prevented.
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公开(公告)号：US11855272B2
公开(公告)日：2023-12-26
申请号：US17617590
申请日：2020-04-08
发明人： Kam Piu Ho , Yingkai Jiang
CPC分类号： H01M4/0404 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/623 , H01M4/625 , H01M2004/028
摘要： A cathode slurry comprises a cathode active material, especially a nickel-containing cathode active material, a binder, a solvent and a base having a formula of R 1R 2R 3N, with improved stability in water. Pre-treatment of nickel-containing cathode active materials may improve stability of the cathode by preventing undesirable decomposition of the material. In addition, battery cells comprising the cathode prepared by the cathode slurry exhibit impressive electrochemical performances.
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公开(公告)号：US20230343963A1
公开(公告)日：2023-10-26
申请号：US17798885
申请日：2021-06-02
发明人： Kam Piu Ho , Yingkai Jiang , Xinying Sun
IPC分类号： H01M4/62
摘要： A conductive composition for a secondary battery, a slurry comprising the same, an electrode comprising the same and a method of preparing the conductive composition are provided. The conductive composition comprises a polymeric material, a carbon nanomaterial and an anionic stabilizing agent. The polymeric material comprises a copolymer comprising a structural unit derived from an acid group-containing monomer and a structural unit derived from a polar group-containing monomer. The conductive composition exhibits an improved stability and dispersibility in water. In addition, battery cells comprising a cathode prepared using the conductive composition disclosed herein exhibit impressive electrochemical performances.
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公开(公告)号：US20230340379A1
公开(公告)日：2023-10-26
申请号：US17916590
申请日：2021-03-15
发明人： Kam Piu Ho , Yingkai Jiang , Yangjian Dong
CPC分类号： C11D11/0029 , C11D7/06 , C11D7/5004
摘要： The invention provides a method for delaminating a composite by immersing the composite into a delamination solution; wherein the composite comprises a metal substrate and a coating applied on one side or both sides of the metal substrate, wherein the coating comprises a polymeric binder; and wherein the polymeric binder comprises an aqueous copolymer. The use of delamination solution comprising a strong base allows for complete delamination of the composite in a highly efficient and extremely fast manner. Furthermore, the delamination method disclosed herein circumvents complex separation processes, contamination and corrosion of the metal substrate and enables an excellent materials recovery. An application of the method for delaminating an electrode for a battery is disclosed herein.
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公开(公告)号：US20230216055A1
公开(公告)日：2023-07-06
申请号：US17927750
申请日：2021-06-15
发明人： Kam Piu Ho , Yingkai Jiang , Tao Gong
IPC分类号： H01M4/62 , H01M4/04 , H01M10/0525
CPC分类号： H01M4/622 , H01M4/0404 , H01M4/624 , H01M10/0525
摘要： Provides an aqueous binder composition for a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a), a structural unit (b), and a structural unit (c). The binder composition disclosed herein has improved binding capability. In addition, battery cells comprising electrodes prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.
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公开(公告)号：US20230198039A1
公开(公告)日：2023-06-22
申请号：US17915493
申请日：2021-06-01
发明人： Kam Piu Ho , Yingkai Jiang , Yangjian Dong
摘要： Provided is a method for delaminating a composite by immersing the composite into a delamination solution; wherein the composite comprises a metal substrate and a coating applied on one side or both sides of the metal substrate, wherein the coating comprises a polymeric binder; and wherein the polymeric binder comprises an aqueous copolymer. The use of delamination solution comprising a strong base allows for complete delamination of the composite in a highly efficient and extremely fast manner. Furthermore, the delamination method disclosed herein circumvents complex separation processes, contamination and corrosion of the metal substrate and enables an excellent materials recovery. An application of the method for delaminating an electrode for a battery is disclosed herein.
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公开(公告)号：US20230178740A1
公开(公告)日：2023-06-08
申请号：US17924375
申请日：2021-06-10
发明人： Kam Piu Ho , Yingkai Jiang , Hongke Qiu , Tao Gong , Priscilla Huen
IPC分类号： H01M4/62 , H01M10/0525
CPC分类号： H01M4/622 , H01M4/624 , H01M10/0525
摘要： A binder composition that can be used in a dry electrode mixture or electrode slurry for producing an electrode is disclosed. The binder composition comprises a water-compatible copolymer, and has a liquid content of less than 85%by weight, based on the total weight of the binder composition. The reduced liquid content of the binder composition improves transport and storage efficiency compared to a conventional wet binder composition. The binder composition disclosed herein is versatile, and can be used successfully in a dry electrode mixture and an electrode slurry. Batteries comprising electrodes prepared with the binder composition disclosed herein have electrochemical performances comparable to batteries comprising electrodes produced via a conventional wet binder composition.
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公开(公告)号：US20230138359A1
公开(公告)日：2023-05-04
申请号：US17912038
申请日：2020-12-25
发明人： Kam Piu Ho , Yingkai Jiang , Yangjian Dong
摘要： Provided is a method for delaminating a composite by immersing the composite into a delamination solution; wherein the composite comprises a substrate and a coating applied on one side or both sides of the substrate comprising a polymeric binder; and wherein the polymeric binder comprises a copolymer comprising a structural unit derived from an acid group-containing monomer. The use of weak acid-containing delamination solution allows for complete delamination of the composite in a highly efficient manner. Furthermore, the delamination method disclosed herein circumvents complex separation process, contamination and corrosion of substrate and enables an excellent materials recovery. An application of the method for delaminating an electrode for a battery is also disclosed.
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