Design of highly-sinterable LATP-CNT composite powder by sequential particle assembly for fabrication of highly electrical-conductive composite electrodes

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2024-05, Vol.35 (5), p.104430, Article 104430
• Main Authors: Ishii, Kento, Yokoi, Atsushi, Sato, Yusaku, Hikima, Kazuhiro, Kawamura, Go, Tan, Wai Kian, Muto, Hiroyuki, Matsuda, Atsunori, Uchikoshi, Tetsuo, Fuji, Masayoshi
• Format: Article
• Language: English
• Subjects: CNT; Composite; LATP; LCP; Sequential particle assembly
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2024.104430

[Display omitted] •Sequential particle assembling was performed to fabricate composite particle.•Cobalt ions and CNT fibers were electrostatically adsorbed onto LATP particles.•The zeta potential of each particle was optimized and the particles were composited.•The finely connected path of each LATP and CNT could be formed in a sintered body. A sequential particle assembling process was developed to fabricate composite particles with multiple components. Cobalt sintering aids and carbon nanotube (CNT) conductive additives were sequentially and electrostatically absorbed on Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte particles under various dispersion conditions. The effect of the particle assembling conditions on the composite body's sintering ability and conductive properties was investigated. By optimizing the microstructure of the composite particle and its particle charging conditions, it became possible to obtain a sintered composite electrode with a finely connected path of each LATP and CNT phase.