High‐Performance Gel Polymer Electrolyte Based on Chitosan–Lignocellulose for Lithium‐Ion Batteries

Abstract

A new gel polymer electrolyte (GPE) based on chitosan‐lignocellulose composites with a smooth and porous structure for applications in lithium‐ion batteries was prepared. The obtained GPE matrix and GPE show excellent comprehensive performances. The GPE matrix based on the composite containing 15 % chitosan (denoted CSLC‐15) had the best performance, with liquid electrolyte uptake of up to 749.1 wt %. The ionic conductivity for corresponding GPE is 2.89 mS cm−1 at room temperature, and the lithium ion transference number is 0.90. The GPE proved promising for use in lithium‐ion batteries, offering a large electrochemical window (4.8 V) and excellent interfacial compatibility (a stable impedance value of 227.97 Ω after 30 days). Moreover, the GPE shows excellent thermal and mechanical properties, and high C‐rates capability (163.13 mAh g−1, 152.53 mAh g−1, 144.27 mAh g−1, 128.45 mAh g−1, 156.12 mAh g−1, at 0.2 C, 0.5 C, 1.0 C, 2.0 C, 0.2 C, respectively) and cycle performance (161.99 mAh g−1 at the 99th cycle of 0.2 C), which proved its suitability of use in lithium‐ion batteries.

Safe and flexible chitosan‐based polymer gel as an electrolyte for use in zinc‐alkaline based chemistries

“…The heightened ductile nature of CPK0.3 is likely due to the amorphous inner pore matrix of the membrane, resulting from the incorporation of KOH. And although the incorporation of additives to the control may reduce its excellent stress properties, for the intended application of this material, and in comparison, to other reported values, it can be said that sample CPK0.3 is a suitable candidate 44–48 . Table 2 displays the mechanical properties of the chitosan electrolyte systems.…”

“…And although the incorporation of additives to the control may reduce its excellent stress properties, for the intended application of this material, and in comparison, to other reported values, it can be said that sample CPK0.3 is a suitable candidate. [44][45][46][47][48] Table 2 displays the mechanical properties of the chitosan electrolyte systems.…”

Reinforce the Adhesion of Gel Electrolyte to Electrode and the Interfacial Charge Transfer via In Situ Electrospinning the Polymeric Nanofiber Matrix

“…Gel electrolyte is usually prepared as an isolated membrane using either conventional phase-transfer method or electrospinning followed by lithium salt solution loading (gelation). [18,[24][25][26] During the battery assembling process, the gel electrolyte is mounted onto the electrodes through mechanical pressing. Owing to the immiscibility of the polymeric matrices of the gel electrolytes and the active materials of the electrodes, it is challenging to make them fully contacted during the assembly, which often generates "physical and chemical" gaps.…”

Micron-sized SiOx/N-doped carbon composite spheres fabricated with biomass chitosan for high-performance lithium-ion battery anodes

“…38,39 Recently, CS has been used to develop CS-based binders and gel polymer electrolytes for LIBs and Li-ion capacitors (LICs). [40][41][42][43][44][45] Because of its high nitrogen content, CS is also a favored precursor for electrode materials such as N-doped activated carbon or nano-composites composed of metal oxides and N-doped carbon (NC). [46][47][48] N-doping can effectively enhance electronic conductivity and contributes extra pseudocapacitive capacity, thus improving electrochemical performance.…”