My Way to Lithium-Ion Batteries Yoshio Nishi I have been engaged in
research and development (R&D) on novel materials for
electronic appliances for 40 years since I joined Sony Corporation
in 1966. I started my scientific career in Sony as a researcher of
zinc-air batteries. After 8 years in R&D on electrochemistry,
my research field was shifted against my will to el- troacoustic
materials, specifically diaphragm materials for electroacoustic
tra- ducers including loudspeakers, headphones, and microphones. My
R&D work also extended to cabinet materials for speaker
systems. This about-face was uncomfo- able for me at first, but it
forced me to devote myself to the investigation of various classes
of materials unfamiliar to me, covering pulp and paper, metals (i.
e. , Ti, Al, Be), ceramics (B4C, TiN, BN, SiC), carbonaceous
materials (carbon fibers, intr- sic carbon, artificial diamond),
reinforcing fibers for FRP (carbon fibers, aromatic polyamide
fibers, glass fibers, SiC fibers, superdrawn polyethylene fibers),
organic polymers (polyamides, polyethylene, polypropylene,
polymethylpentene, poly- ides, polysulfones, polyetherimides,
polyethersulfones, PET), boards (plywood, particle board), resin
composites (bulk molding compounds, resin concretes, arti- cial
marble), and so on. I also was engaged in development of
piezoelectric lo- speakers employing poly(vinylidene difluoride)
(PVdF). The remarkably successful output from my R&D activities
in those days were organic polymer whiskers and bacterial
cellulose. The former was the first organic whisker in the world
disc- ered by M. Iguchi,1 which is composed of polyoxymethylene
(POM).
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