A biobased ionic liquid crystal derived solid polymer electrolyte (BILC‐SPE) membrane, consisting of polymeric backbone, lithium salt, and cardanol derived ionic liquid crystals along with conventional plasticizer is fabricated using a facile and simple strategy. The in‐house prepared solid polymer electrolyte membrane within optimum concentration of individual counterparts has been deployed as electrolyte cum separator in lithium‐ion cells in combination with oxide and phosphate family cathodes individually to demonstrate its suitability and compatibility for energy storage applications. With carefully chosen 3‐(4‐(3‐pentadecylphenoxy) butyl)‐1‐methylimidazole‐3‐ium hexafluorophosphate as the ionic liquid crystal counterpart, the membrane exhibits high conductivity along with high porosity, wettability, and Li‐ion transport number owing to the presence of anisotropic channels that aid the facile transport kinetics desired for the cell performance. Promising results obtained regarding compatibility of cell components, excellent specific capacity, appreciable Coulombic efficiency, and cycling stability of the lithium‐ion cell investigated with BILC‐SPE developed from the low‐cost industrial waste not only revolutionize the performance of energy storage devices but also render a platform to create cleaner environment.

Interconnected microporous and heteroatom containing bio‐carbon, derived from universal household waste i. e. cooked rice has been investigated as an anode material for lithium and sodium‐ion batteries. Cooked rice derived carbon (CRC), prepared by an economically viable carbonization process, bestowed with the presence of nitrogen atom due to the bacillus cereus bacteria is chemically activated with KOH at different temperatures such as 800, 850 and 900° C. Among the prepared samples, CRC‐900 anode delivers an exceptionally high progressive capacity of ≈1000 mAh g‐1 at 100 mA g−1 for 100 cycles and reasonable capacity of 169 mAh g−1 for 1000 cycles. Further, CRC‐900 anode demonstrates high rate performance by delivering 260 mAh g−1 at 2 A g−1 in LIBs and an acceptable capacity of 78 mAh g−1 in SIBs at 2 A g−1condition. CRC is found to contain micro and meso‐porous structure along with high surface area (1899 m2 g−1) to endorse its suitability to this extend as an anode for LIBs and SIBs. The study illustrates the exploitation of waste‐to‐wealth attempt with an ultimate aim of recommending CRC as a potential anode for energy storage applications on the basis of low cost, cheap, eco‐benign electrode obtained from biodegradable cooked rice.