Carboxymethyl chitosan: A new water soluble binder for Si anode of Li-ion batteries

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

“…Recently, carboxymethyl chitosan (C-chitosan), a water-soluble chitosan derivative prepared by the carboxymethylation of chitosan, was considered as a binder for Si anodes [34]. An Si anode with C-chitosan as a binder showed high initial Coulombic efficiency of 89% and delivered a high reversible capacity of 950 mAh g -1 at a current density of 500 mA g -1 over 50 cycles.…”

Water‐Soluble Conductive Composite Binder Containing PEDOT:PSS as Conduction Promoting Agent for Si Anode of Lithium‐Ion Batteries

“…[16,17] Recent studies have shown that the electrochemical performances of Si electrode are critically dependent on the binder. [18][19][20][21] Much attention is recently devoted to the development of water-soluble binders for Si anode such as alginate and its derivative, [18,19] polyacrylic acid, [20,21] carboxymethyl cellulose (CMC), [22] chitosan [23] and its water-soluble derivatives, [24] due to their major advantages: 1) by using water as solvent, the electrode fabrication process is environmentally friendly and less costly; 2) the hydrogen bonding between the carboxylic group of these polymers and Si surface is highly beneficial to reduce the electrode damage induced by volume change over cycling. [18][19][20][21][22][23][24] However, we noted that the conducting agents, which used with these water-soluble binders for not only anode materials (e.g.…”

“…[18][19][20][21] Much attention is recently devoted to the development of water-soluble binders for Si anode such as alginate and its derivative, [18,19] polyacrylic acid, [20,21] carboxymethyl cellulose (CMC), [22] chitosan [23] and its water-soluble derivatives, [24] due to their major advantages: 1) by using water as solvent, the electrode fabrication process is environmentally friendly and less costly; 2) the hydrogen bonding between the carboxylic group of these polymers and Si surface is highly beneficial to reduce the electrode damage induced by volume change over cycling. [18][19][20][21][22][23][24] However, we noted that the conducting agents, which used with these water-soluble binders for not only anode materials (e.g. Si, graphite and lithium titanate) but also various cathode materials, are still the conventional carbonaceous materials such as acetylene black (AB), [25] carbon black, [26] graphite powder, [27] graphene [2 , 8] carbon nanotubes [29][30][31] and nanofibers.…”

“…[40] That work, together with our recent work on the development of chitosan derivatives as new water-soluble binders for Si/SnS 2 anodes [24,41] and LiFePO 4 cathodes, [42] prompted us to propose a concept of water-soluble conductive composite binder by incorporating conductive PEDOT:PSS into water-soluble binder. The introduction of conductive PEDOT:PSS component aims to: 1) form homogenous and continuous conducting bridges throughout the whole electrode by utilizing the superior film-forming property of PEDOT:PSS; 2) increase the compaction density of the electrode by reducing the use of the conducting agent of the commonly used acetylene black in Liion batteries.…”

Investigation of polymer dynamics in chitosan-maghemite nanocomposites: a potential green superparamagnetic material

“…Moreover, it can be easily fabricated into tablets, capsules, microspheres, nanoparticles, beads, films and gels for different kind of applications [27]. Recently, chitosan based polymer material has been explored for electrochemical energy storage and conversion technologies such as fuel cells, batteries and supercapacitors [28][29][30]. Chitosan structure has one amino and two hydroxyl groups on the backbone of hexosaminide residue [31].…”