公开(公告)号：US20240380005A1

公开(公告)日：2024-11-14

申请号：US18597194

申请日：2024-03-06

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： FENG LIANG ,  DONGRONG YANG ,  DA ZHANG ,  BAOQIANG XU ,  BIN YANG

IPC: H01M10/0565 ,  H01M10/054 ,  H01M50/403 ,  H01M50/414 ,  H01M50/451

Abstract: An asymmetric sodium-based solid-state composite electrolyte includes a first solid-state composite electrolyte layer and a second composite electrolyte layer obtained by laminated coating method. Both the two solid-state composite electrolyte layers include a polymer matrix, an inorganic filler, a sodium salt and a plasticizer, the difference is the electron conductive agent added with the mass ratio ranges from 1 wt. %˜10 wt. % into the second solid-state composite electrolyte layer. In a battery assembled with the asymmetric sodium-based solid-state composite electrolyte, the first solid-state composite electrolyte layer is contiguous with a positive electrode, and the second solid-state composite electrolyte layer is disposed between the first solid-state composite electrolyte layer and a negative electrode.

公开(公告)号：US20240222697A1

公开(公告)日：2024-07-04

申请号：US18537953

申请日：2023-12-13

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  JIANGSU FENGCHI CARBON BASED NEW MATERIAL RESEARCH INSTITUTE CO., LTD

Inventor： FENG LIANG ,  MINJIE HOU ,  DA ZHANG ,  TAO ZHANG ,  SUNZU XIANG ,  WENLONG JIANG ,  BAOQIANG XU ,  BIN YANG

IPC: H01M10/0562

CPC classification number: H01M10/0562 ,  H01M2300/0068

Abstract: A method for preparing a sodium super ionic conductor solid electrolyte by low-dimensional crystallization belongs to a field of energy materials. The method is based on the theory of negative ion coordination polyhedron growth unit, and uses low-temperature plasma as a protective gas of a spray drying equipment. While evaporating the solvent in a sodium super ionic conductor solid electrolyte precursor slurry, plasma active groups modify the particle surface of the sodium super ionic conductor solid electrolyte precursor particles in-situ. A free space dimension of crystal growth in the crystallization process is reduced, and directional growth of crystals in the solid phase sintering process is induced. Secondly, the dispersion stability of the sodium super ionic conductor solid electrolyte precursor particles is improved. Compared with the traditional high-temperature solid-state sintering process, the method has the advantages of fast crystallization speed, high crystal purity and integrity, good compactness, and uniform particles.