Improvement of electrochemical characteristics of natural graphite negative electrode coated with polyacrylic acid in pure propylene carbonate electrolyte

Abstract

In order to improve the negative electrode characteristics of a graphite electrode in a propylene carbonate (PC) -containing electrolyte, we have prepared a graphite negative electrode coated with a water-soluble anionic polymer as a binder for composite graphite electrodes. The electrochemical characteristics of the coated graphite were evaluated by cyclic voltammetry and charge-discharge cycle tests. The coated graphite negative electrode showed a stable Li + ion intercalation / deintercalation reaction without the exfoliation of the graphene layers caused by the co-intercalation of the PC solvent in the LiClO 4 / PC solution. The charge-discharge characteristic of the coated graphite negative electrode in a PC -containing electrolyte was almost the same as that in ethylene carbonate-based electrolyte.

Influence of the binder types on the electrochemical characteristics of natural graphite electrode in room-temperature ionic liquid

“…The natural graphite (Kansai Coke and Chemical Co. NG-3) electrodes coated with the PAA binder and PVdF binder were prepared in a similar way as previously reported [7]. In…”

“…On the other hand, our group found that polyacrylic acid (PAA), which is a water-soluble polymer, was able to be used as the binder of the graphite electrode [7]. In a propylene carbonate (PC)-based electrolyte, electrochemical Li + ion intercalation into graphite layers does not occur due to the co-intercalation and significantly reductive decomposition of PC molecules at around 1.0 V vs. Li/Li + , causing exfoliation of the graphite layers [8].…”

“…expected that the charge-discharge reaction of the graphite electrode would be improved in RTILs because the uses of PC-based electrolyte and PAA binder enabled the reaction [7].…”

UV-Vis and XRD investigation of graphite-doped poly(acrylic) acid membranes

“…In both these applications, the introduction of graphite increases the electric conductivity of the polymer [13,14], but the addition of inorganic dopants could have an important influence on the microscopic physical properties of the polymeric matrix, modifications that can be investigated only by spectroscopic techniques. The aim of our study was the observation of possible modifications in the local structure of PAA induced by the addition of graphite to the polymeric matrix.…”

Preparation of a composite anode for lithium-ion battery using a commercial water-dispersible non-fluorinated polymer binder

“…Lithium and sodium salts of carboxymethyl cellulose (NaCMC and LiCMC) and xanthan gum (XG) or the conjugated polymer poly(3,4-ethylenedioxythiophene) (PEDOT) were investigated as binders for MCMB carbon anodes [9]. In order to improve the negative electrode characteristics of a graphite electrode in a propylene carbonate (PC)-containing electrolyte, Koichi et al [10] have prepared an electrode coated with a watersoluble polyacrylic acid (PAA) as a binder. Park et al [11] have investigated the use of PAA as a binder for siliconbased anode finding that the electrode containing the PAA has a lower first-cycle irreversible capacity when compared to the traditional electrodes.…”