公开(公告)号：US20200303720A1

公开(公告)日：2020-09-24

申请号：US16361740

申请日：2019-03-22

申请人： LG CHEM, LTD. ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Chi Ho JO ,  Wang Mo JUNG ,  Dong Hun LEE ,  Ying Shirley MENG ,  Abhik BANERJEE ,  Minghao ZHANG

IPC分类号： H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0562 ,  H01M10/0525

摘要： A method of treating the surface of a positive electrode active material that is capable of inhibiting a reaction at the interface between a sulfide-based solid electrolyte and the positive electrode active material. A positive electrode active material particle for sulfide-based all-solid-state batteries, the surface of which is reformed, using the method and a sulfide-based all-solid-state battery, the charge/discharge characteristics of which are improved, including the same are also disclosed. The positive electrode active material particle for sulfide-based all-solid-state batteries manufactured using a dry-type method exhibits larger capacity than a positive electrode active material particle for sulfide-based all-solid-state batteries manufactured through a conventional wet-type process. In addition, the manufacturing process is simplified, and the amount of byproducts is reduced.

公开(公告)号：US20230014961A1

公开(公告)日：2023-01-19

申请号：US17782977

申请日：2020-12-10

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Zheng CHEN ,  Darren Huan Shen TAN ,  Abhik BANERJEE ,  Ying Shirley MENG

IPC分类号： H01M10/54 ,  H01M10/0585 ,  B09B3/80 ,  B09B3/40 ,  B09B3/70 ,  C01G51/00 ,  C01B25/14

摘要： In a method for recycling all solid-state batteries, spent battery cells are dissolved in anhydrous ethanol. The resulting solution is separated into solids and supernatants which are separately processed to regenerate the solid electrolyte and the solid electrode materials. The supernatant is subjected to vacuum evaporation to precipitate an electrolyte powder, which is then annealed under flowing oxygen. The solid electrode material is regenerated by washing the solids with water, drying the washed solids, relithiating the washed solids, and annealing the relithiated solids. The resulting materials are suitable for use in fabrication of new all-solid state batteries.

公开(公告)号：US20230115956A1

公开(公告)日：2023-04-13

申请号：US17911127

申请日：2021-03-12

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Ying Shirley MENG ,  Erik WU ,  Swastika BANERJEE ,  Han Mei TANG ,  Shyue Ping ONG ,  Abhik BANERJEE

IPC分类号： H01M10/0562 ,  H01M4/40 ,  H01M4/485 ,  H01M10/054

摘要： Sodium-based all solid-state batteries exhibit improved battery cycle life and stability with the use of a new chloride-based sodium solid electrolyte in which sodium diffusivity within the electrolyte is enhanced through substitution of atoms including one or more of Y with Zr, Ti, Hf, Ta, and Na with one or more of Ca and Sr.

公开(公告)号：US20230113915A1

公开(公告)日：2023-04-13

申请号：US17913110

申请日：2021-03-19

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Ying Shirley MENG ,  Abhik BANERJEE ,  Hanmei TANG ,  Erik WU ,  Han NGUYEN ,  Darren Huan Shen TAN ,  Jean-Marie DOUX ,  Shyue Ping ONG

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M10/0562

摘要： An interfacial protective coating layer of LTO is effective in preventing unwanted interfacial reactions between the solid-state electrolyte and cathode electrodes from occurring. Incorporation of the inventive coating into sodium-based all-solid-state batteries allows for room temperature operation, high voltage, and long cycle life.