Cycle performance improvement of LiFePO4 cathode with polyacrylic acid as binder

The polyacrylic latex: an efficient water-soluble binder for LiNi1/3Co1/3Mn1/3O2 cathode in li-ion batteries

“…Recently, remarkable research has been reported on exploring these water soluble binders for cathode materials. Carboxymethyl cellulose (CMC) [24,35], polyacrylicacid (PAA) [2,30], and polyacrylic latex (LA132) [11,12] have already been used as binders for cathode materials, such as lithium iron phosphate (LFP), lithium cobalt oxide (LCO), and lithium manganese oxide (LMO). These water soluble polymers have some advantages over the commercial nonaqueous PVDF in improving electrochemical performances of the cathode, especially the rate capability.…”

Chitosan oligosaccharides: A novel and efficient water soluble binder for lithium zinc titanate anode in lithium-ion batteries

“…The smaller potential separation indicates better kinetics characteristics and reversibility of the Li 2 ZnTi 3 O 8 electrodes with COS binder system, which can be ascribed to lower potential polarization of the cathode during charge and discharge [18].…”

“…Then the binder film was taken out to weight the m 1 after removing the residual electrolyte on the surface. Third, the increased mass percent of A C C E P T E D M A N U S C R I P T binder film was calculated by (m 1 -m 0 )/m 0 [18], and the results are summarized in Table 2. It can be clearly seen that the PVDF powder easily swell and the proportion is as high as 23.9 %, while COS binder is only 5.3 %.…”

“…As for commercial lithium-ion batteries, polyvinylidene fluoride (PVDF) is the most popular polymer used as a binder for both positive and negative electrodes because of its good electrochemical stability, binding A C C E P T E D M A N U S C R I P T capability and ability to adsorb electrolyte [16]. However, PVDF itself has some shortcomings: (1) Lithium metal and Li x C 6 could react with PVDF to form LiF and -(-C=C-F)-on the electrode surface via an exothermic reaction which causes a risk for the onset of thermal runway, especially at elevated temperature [17]; (2) PVDF is requires dissolved in the volatile, flammable and explosive N-Methyl Pyrrolidone (NMP), which poses serious pollution to the environment; (3) PVDF is readily swollen, low flexibility and easy to dissolve in non-aqueous liquid electrolytes, which result in desquamation of electrode particles and poor long cycle life [18]; (4) The cost of PVDF is high, and it is not easy to dispose PVDF at the end of the battery life [19]. Due to these disadvantages, to find cheap, non-toxic and environmentally friendly binders to substitute for PVDF binder is very important for improvement of electrochemical performance and for decreasing manufacturing cost of lithium-ion batteries.…”

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

“…The binder film was taken out to weigh after removing the residual electrolyte on the surface at various intervals of time (m t ). The increased mass percent of the binder was calculated by (m t −m 0 )/m 0 [14], and the results are reported in Fig. 4.…”