Waseda University · Materials Science
Professor Hiroyuki Nishide's research lab specializes in the design and development of advanced functional polymers for sustainable energy applications. The lab focuses on radical polymers with stable organic radicals, particularly TEMPO-based systems, for high-performance electrochemical devices such as aqueous rechargeable batteries and supercapacitors. Key research directions include the synthesis of hydrophilic redox-active polymers, chelate resin formation for selective metal ion capture, and the integration of these materials into efficient, eco-friendly energy storage systems. The lab emphasizes materials that enable fast electron transfer, high Coulombic efficiency, and long-term cyclability in aqueous electrolytes.
Figures are computed from collected data and may differ slightly.
Abstract Radical polymers are aliphatic or nonconjugated polymers bearing organic robust radicals as pendant groups per repeating unit. A large population of the radical redox sites allows the efficient redox gradient‐driven electron transport through the polymer layer by outer‐sphere self‐exchange reactions in electrolyte solutions. The radical polymers are emerging as a new class of electroactive materials useful for various kinds of wet‐type energy storage, transport, and conversion devices.
Abstract Chelate forming resins ( 3 ) were prepared by crosslinking poly(4‐vinylpyridine) ( 1 ) with 1,4‐dibromobutane ( 2 ) and their complexation with metal ions was studied. Stability constants ( K ) were found to be much higher for the Cu‐ 3 system than for the Cu‐ 1 system, which indicates that 3 uptakes Cu ions with high efficiency. K and the adsorption capacity of Cu decrease largely with increasing degree of crosslinking. Visible and ESR spectra of Cu‐ 3 show that the structure of the Cu
A film of poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl vinylether) coated on a current collector displayed a rapid and reversible electrochemical response in aqueous electrolytes, and allowed an ultrafast full charging of 3 mC cm(-2) in as short as 3 seconds by virtue of the combination of the hydrophilic radical polymer and the aqueous electrolyte possessing a high electrical conductivity.
Abstract A new chelate resin was prepared by crosslinking poly(4-vinylpyridine) with a metal ion (Cu2+, Fe3+, Co2+, Zn2+, Ni2+, and Hg2+) as a template. The resin comparatively adsorbed the metal ion which was used as a template. The stability constants of the copper complexes with the resins were measured.
Poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl acrylamide) was designed and synthesized as an electrode-active polymer for an organic rechargeable device containing an aqueous electrolyte. The device demonstrated a 1.2 V output voltage, exceeded 2000 charging–discharging cycles, and had a high charging rate performance within 1 min.
Abstract A hydrophilic poly(vinyl ether)‐backbone polymer bearing a pendant TEMPO radical, poly(2,2,6,6‐tetramethylpiperidinyloxy‐4‐yl vinyl ether) (PTVE), was designed as a cathode‐active material, which displays a reversible one‐electron redox capability, even in an aqueous electrolyte. The PTVE layer coated on a current collector demonstrated a rapid charging‐discharging rate based on the combination of the redox‐active nitroxide radicals built into the hydrophilic polymer and the aqueous ele
A transparent nanocomposite of a radical polymer, the poly(2,2,6,6-tetramethylpiperidine-1-oxy-4-yl methacrylate) (PTMA), and single-walled carbon nanotubes (SWNTs) display a reversible charging and discharging, allowing for full discharging in seconds. This is ascribed to the reversible electrochemical reaction of the pendant radical group in PTMA aided by both PTMA wrapping at a molecular level and the SWNT network for electrical conduction.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDual-mode transport of molecular oxygen in a membrane containing a cobalt porphyrin complex as a fixed carrierHiroyuki. Nishide, Manshi. Ohyanagi, Osamu. Okada, and Eishun. TsuchidaCite this: Macromolecules 1987, 20, 2, 417–422Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pubs.acs.org/doi/10.1021/ma00168a032https://doi.org/10.1021/ma00168a032research-articleACS Publicatio
Chemically stable poly[2-(3,5-di-tert-butyl-4-oxyphenyl)-1,4(p)-phenylenevinylene], poly[4-(3,5-di-tert-butyl-4-oxyphenyl)-1,3(m)-phenylenevinylene], and poly[4-(3,5-di-tert-butyl-4-oxyphenyl)-1,2(o)-phenylenevinylene] were synthesized via the polymerization of 4-bromo-2-(3,5-di-tert-butyl-4-acetoxyphenyl)styrene, 5-bromo-2-(3,5-di-tert-butyl-4-acetoxyphenyl)styrene, and 2-bromo-4-(3,5-di-tert-butyl-4-acetoxyphenyl)styrene, respectively, using a palladium catalyst. The o- and p-polyradicals, eve
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible coordination and facilitated transport of molecular nitrogen in poly((vinylcyclopentadienyl)manganese) membraneHiroyuki Nishide, Hiroyoshi Kawakami, Yoshimi Kurimura, and Eishun TsuchidaCite this: J. Am. Chem. Soc. 1989, 111, 18, 7175–7179Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published inissue 1 August 1989https://pubs.acs.org/doi/10.1021/ja00200a041https://doi.org/10.1021/ja00200a041research-ar
Exchanged: The organic radical 2-azaadamantan-N-oxyl (AZA; see picture) is found to be a stable and highly reactive redox mediator in dye-sensitized solar cell (DSSC) electrolytes. This radical has an appropriate redox potential and significantly high values for the diffusivity, heterogeneous electron-transfer rate, and electron self-exchange reaction rate. In a DSSC the AZA-based electrolyte achieves an excellent photovoltaic performance. Detailed facts of importance to specialist readers are p
Open papers in the app to read, cite, and organize with AI.
