A high-capacity Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a dual concentration gradient for next-generation lithium-ion batteries
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Other documents of the author: Park, Kang-Joon; Lim, Byung-Beom; Choi, Moon-Ho; Jung, Hun-Gi; Sun, Yang-Kook; Haro, Marta; Vicente-Agut, Nuria; Bisquert, Juan; Garcia-Belmonte, Germà
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Title
A high-capacity Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a dual concentration gradient for next-generation lithium-ion batteriesAuthor (s)
Date
2015-09Publisher
Royal Society of ChemistryBibliographic citation
PARK, Kang-Joon, et al. A high-capacity Li [Ni 0.8 Co 0.06 Mn 0.14] O 2 positive electrode with a dual concentration gradient for next-generation lithium-ion batteries. Journal of Materials Chemistry A, 2015, vol. 3, no 44, p. 22183-22190.Type
info:eu-repo/semantics/articlePublisher version
http://pubs.rsc.org/is/content/articlehtml/2015/ta/c5ta05657hVersion
info:eu-repo/semantics/publishedVersionAbstract
To increase the reversible capacity of layered lithium nickel-cobalt-manganese oxide, a Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a two-sloped full concentration gradient (TSFCG) was successfully synthesized via ... [+]
To increase the reversible capacity of layered lithium nickel-cobalt-manganese oxide, a Li[Ni0.8Co0.06Mn0.14]O2 positive electrode with a two-sloped full concentration gradient (TSFCG) was successfully synthesized via co-precipitation. The TSFCG maximizes the Ni concentration in the particle core and the Mn concentration on the particle surface. The TSFCG Li[Ni0.8Co0.06Mn0.14]O2 positive electrode showed improved overall electrochemical properties (i.e., reversible capacity, cycle life, and rate capability) and thermal stability compared to a conventional positive electrode (CC) Li[Ni0.8Co0.06Mn0.14]O2 without a concentration gradient. Electrochemical impedance spectroscopy showed that the high stability of the outer surface composition of Li[Ni0.64Co0.06Mn0.30]O2 is responsible for reduction in surface resistance and charge transfer resistance by decreasing the parasitic reaction with the electrolyte. These reduced resistances explain the superior rate capability of TSFCG positive electrodes. [-]
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