3 documents found, page 1 of 1
Development of sulfur based polymers for rechargeable lithium batteries
Almeida, Carlos M.F.; Queiroz, Ana; Dias, Rolando; Costa, Mário RuiLithium-ion (Li-ion) batteries are in the front edge of recent achievements concerning energy storage. However, Li-ion devices are reaching their maximum regarding energy density storage which restricts their appiicatíon in systems with large power needs, such as electric vehicles. Driven by this shortcoming, in the last few years, Lithium-Sulfur (Li-S) batteries are being considered as an alternative for the e...
Electrochemical activity of sulfur networks synthesized through RAFT polymeriza...
Almeida, Carlos M.F.; Costa, Hugo Davide; Kadhirvel, Porkodi; Queiroz, Ana; Dias, Rolando; Costa, Mário RuiNovel results concerning the inverse vulcanization of sulfur using reversible addition–fragmentation chain transfer (RAFT) polymerization are here reported. It is shown that RAFT polymerization can be used to carry out this cross-linking process, with the additional possibility to extend the reaction time from a few minutes as with classical free radical polymerization (FRP) to several hours. Higher control on ...
Avaliação das propriedades eletroquímicas de polímeros de enxofre através de vo...
Almeida, Carlos M.F.Neste trabalho foi realizada a avaliação das propriedades eletroquímicas de copolímeros com elevado teor de enxofre, Poli(S-DIB), por voltametria cíclica (CV). Estes materiais poliméricos demonstraram preservar as propriedades eletroquímicas do enxofre com a vantagem de serem processáveis e quimicamente estáveis com potencial para serem usados em cátodos. Os copolímeros foram sintetizados por vulcanização inver...