Energy crisis and environmental pollution are the major problems faced by all the people at present time. It is time to switch over to biopolymer electrolyte-based batteries instead of synthetic due to its high cost and not being environmentally green. Biopolymer membranes have been prepared using 1 g K-carrageenan with different molar mass percentages of LiNO₃ by solution casting technique using double-distilled water as a solvent. Prepared biopolymer electrolyte membranes are characterized by XRD, FTIR, DSC, and AC impedance techniques. XRD confirms the amorphous nature of the biopolymer membranes. FTIR reveals the complexation formed between 1 g K-carrageenan and LiNO₃. It has been found from DSC analysis that glass transition temperature of the biopolymer membrane 1 g K-carrageenan with LiNO₃ decreases due to the addition of salt compared to the pure biopolymer 1 g K-carrageenan. Biopolymer membrane 1 g K-carrageenan with 0.65 wt% of LiNO₃ has got the highest ionic conductivity of 1.89 × 10⁻³ S cm⁻¹. Transference number analysis has been done by Wagner’s polarization method and Bruce and Vincent method. Electrochemical stability has been studied by linear sweep voltammetry. The highest conducting biopolymer membrane (1 g K-carrageenan with 0.65 wt% of LiNO₃) is electrochemically stable up to 3.2 V. Lithium ion conducting battery has been constructed using the highest conducting biopolymer membrane and its performance has been analyzed.

中文翻译：

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基于LiNO 3的K-角叉菜胶的锂离子导电生物聚合物膜

能源危机和环境污染是当今全人类面临的主要问题。由于成本高且不环保，是时候改用生物聚合物电解质电池了，而不是合成电池。已通过使用双蒸馏水作为溶剂的溶液流延技术，使用具有不同摩尔质量百分比的LiNO ₃的1g K-角叉菜胶制备了生物聚合物膜。制备的生物聚合物电解质膜通过XRD，FTIR，DSC和AC阻抗技术进行表征。XRD证实了生物聚合物膜的无定形性质。FTIR显示1 g K-角叉菜胶与LiNO ₃之间形成络合物。从DSC分析已经发现，与纯生物聚合物1g K-角叉菜胶相比，由于添加了盐，具有LiNO ₃的生物聚合物膜1g K-角叉菜胶的玻璃化转变温度降低。具有0.65wt％的LiNO _3的生物聚合物膜1g K-角叉菜胶具有1.89×10 ^-3 S cm ^-1的最高离子电导率。转移数分析采用Wagner极化法和Bruce and Vincent法进行。通过线性扫描伏安法研究了电化学稳定性。导电性最高的生物聚合物膜（1 g角叉菜胶与0.65 wt％的LiNO ₃）在高达3.2 V的电压下具有电化学稳定性。锂离子导电电池已使用导电性最高的生物聚合物膜制成，并对其性能进行了分析。