Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Abstract

Solid polymer electrolytes (SPEs) for Li-metal polymer batteries are prepared, in which poly(ethylene oxide) (PEO), lithium bis(trifluoromethylsulfonyl)imide (LiTFSI), and copper-oxide fillers are formulated. Their structural and electrochemical properties are analyzed when the morphology of the copper-oxide fillers has been modulated to spherical or dendritic structure. The ionic conductivity obtained by electrochemical impedance spectroscopy (EIS) has been increased to 1.007 Â 10 À4 S cm À1 at 30 C and 1.368 Â 10 À3 S cm À1 at 60 C, as the 5 wt% dendritic fillers have been added to the SPEs. This ionic conductivity value is 1.3 times higher than that of 5 wt% spherical filler-contained SPEs. The analyses of differential scanning calorimetry (DSC) and X-ray diffraction (XRD) indicate that the increase of ionic conductivity is due to the remarkable decrease of crystallinity upon the addition of copper-oxide filler into PEO matrix of SPEs. The fabricated SPEs with the dendritic copper-oxide fillers present a total ionic transference number of 0.99 and a lithium-ion transference number of 0.38. More importantly, it presents a stable potential window of 2.0-4.8 V at 25 C and high thermal stability up to 300 C. The specific discharge capacity of the prepared cell with the dendritic filler-contained SPEs is measured to be 51 mA h g À1 and 125 mA h g À1 under 0.1 current-rate (C-rate) at 25 C and 60 C, respectively. In this study, the ionic conductivity and the electrochemical performance of the PEO-based polymer electrolyte have been evaluated when morphologically different copper-oxide fillers have been incorporated into the PEO matrix. We have also confirmed the safety and the flexibility of the prepared solid polymer electrolytes when they are used in flexible lithium-metal polymer batteries (LMPBs).

Cardanol-Derived Epoxy Resins as Biobased Gel Polymer Electrolytes for Potassium-Ion Conduction

“… 25 , 26 This has forced the scientific community to investigate the use of polymer matrices for the preparation of quasi-solid electrolytes (where the electrolyte solution is trapped in a cross-linked polymeric matrix) 27 − 30 and fully solid ones (in which the mobility of lithium ions is exclusively guaranteed by the segmental movement of polymer chains in the amorphous phase). 31 − 33 Most of these polymeric systems are based on poly(ethylene oxide) (PEO) of petrochemical derivation due to its favorable electrochemical stability, ability to reversibly complex metal cations (starting from lithium ions), and its processability aimed at obtaining quasi-solid and solid electrolytes. 34 − 36 …”

“…In this respect, growing interest is nowadays devoted to the world of rechargeable batteries, , whose market penetration is experiencing a significant acceleration not only in portable electronics and sustainable mobility but also in the field of large-scale electricity storage in power plants connected with photovoltaic or wind power stations. In these sectors, safety is a crucial and still an unsolved aspect, as the vast majority of commercial (lithium-based) batteries still work with electrolytes obtained using flammable and, in some conditions, even explosive organic solvents mixed with salts. , This has forced the scientific community to investigate the use of polymer matrices for the preparation of quasi-solid electrolytes (where the electrolyte solution is trapped in a cross-linked polymeric matrix) − and fully solid ones (in which the mobility of lithium ions is exclusively guaranteed by the segmental movement of polymer chains in the amorphous phase). − Most of these polymeric systems are based on poly­(ethylene oxide) (PEO) of petrochemical derivation due to its favorable electrochemical stability, ability to reversibly complex metal cations (starting from lithium ions), and its processability aimed at obtaining quasi-solid and solid electrolytes. − …”

Long‐Life Zn Anode Enabled by Low Volume Concentration of a Benign Electrolyte Additive

“…where σ (S cm −1 ) is the conductivity, R s is the electrolyte resistance, L (cm) is the distance between the two Ti electrodes, and A is electrode area (cm −2 ). [49] The linear sweep voltammetry (LSV) of the electrolytes (using 1M Li 2 SO 4 instead of ZnSO 4 ) was examined at a scan rate of 5 mV s −1 in a three-electrode system with a Ti foil as the working electrode, a platinum electrode as the counter electrode, and an Ag/AgCl reference electrode (INTERFACE1010, Gamry, USA). Cyclic voltammetry (CV) profiles for the Zn plating/stripping were recorded in the same three-electrode system as above at the same scan rate.…”

Enhancement of the electrochemical performance of lithium-ion batteries by SiO2@poly(2-acrylamido-2-methylpropanesulfonic acid) nanosphere addition into a polypropylene membrane

“…The development direction of LIBs, nowadays, is towards high output power, high capacity, and fast charging mode. [1][2][3][4][5][6][7][8][9] Therefore, the innovation of preparation technology related to the membrane of LIBs is also in urgent need of a breakthrough. [10][11][12][12][13][14][15][16] Changqing Zhu et al acquired an aramid nanober/polyphenylene sulde (ANFs/PPS) nonwoven composite separator via a paper-making method.…”