公开(公告)号：WO2020252216A1

公开(公告)日：2020-12-17

申请号：PCT/US2020/037331

申请日：2020-06-11

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： CHEN, Kuan-Hung ,  DASGUPTA, Neil ,  SAKAMOTO, Jeffrey ,  NAMKGOONG, Min, Ji

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

Abstract: An anode for a lithium ion battery is disclosed includes a first major face, a second major face that, together with the first major face, defines a thickness of the anode, and at least one carbonaceous electrochemically active lithium host material distributed between the first and second major faces of the anode, The at least one carbonaceous electrochemically active lithium host material is selected from the group consisting of graphite, hard carbon, or a blend of graphite and hard carbon. The anode additionally defines a plurality of vertical channels extending at least partially through the thickness of the anode. A lithium-ion batter that includes the disclosed anode and a method of charging a lithium-ion battery that includes the disclosed anode are also disclosed.

公开(公告)号：WO2017184482A1

公开(公告)日：2017-10-26

申请号：PCT/US2017/027869

申请日：2017-04-17

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： DASGUPTA, Neil, P. ,  WOOD, Kevin, N. ,  CHEN, Kuan-Hung

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/46 ,  H01M4/88 ,  H01M6/16

CPC classification number: H01M4/382 ,  H01M4/0445 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/052

Abstract: Disclosed are methods for pre-conditioning or pre-treating the surface of a metal (e.g., lithium) electrode such that the cycle life and efficiency of the electrode within an electrochemical cell are improved through the prevention of dendrite growth. The pretreatment process includes the use of an alternating current to modify the surface properties of the metal electrode, such that a more uniform flux of metal ions is transferred across the electrode-electrolyte Interface in subsequent electrodeposition and electrodissolution processes. As a result, an electrode treated with such a process exhibits improved performance and durability, including markedly lower overpotentials and largely improved metal (e.g., lithium) retention in strip plate tests as compared with untreated electrodes.

Abstract translation: 公开了用于预处理或预处理金属（例如，锂）电极的表面的方法，使得电化学电池内的电极的循环寿命和效率通过防止 枝晶生长。 预处理过程包括使用交流电来改变金属电极的表面性质，使得在随后的电沉积和电解溶解过程中更均匀的金属离子通量在电极 - 电解质界面上转移。 结果，用这种方法处理的电极显示出改进的性能和耐久性，包括与未处理的电极相比，在极板试验中明显更低的过电位和极大改善的金属（例如锂）保留。

公开(公告)号：WO2021243163A2

公开(公告)日：2021-12-02

申请号：PCT/US2021/034774

申请日：2021-05-28

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： DASGUPTA, Neil, P. ,  CHEN, Kuan-Hung ,  KAZYAK, Eric

IPC: H01M10/0525 ,  H01M4/66 ,  C23C16/409 ,  C23C16/4417 ,  C23C16/45529 ,  C23C16/45553 ,  C23C28/00 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025 ,  H01M2300/0065 ,  H01M4/0404 ,  H01M4/0428 ,  H01M4/0435 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/1397 ,  H01M4/366 ,  H01M4/382 ,  H01M4/386 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/62

Abstract: A method of making an ionically conductive layer for an electrochemical device is disclosed. A film is coated on electrode material particles or post-calendered electrodes. This coating may be a lithium borate-carbonate film deposited by atomic layer deposition. One example method includes the steps of: (a) exposing a substrate including an electrode material to a lithium-containing precursor followed by an oxygen- containing precursor; and (b) exposing the substrate to a boron-containing precursor followed by the oxygen-containing precursor.