Department Of Physics
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Item Study of Compatible Anode for Silicate-Based Cathode Material(Springer Science and Business Media Deutschland GmbH, 2023-05-21T00:00:00) Pateriya, Ravi Vikash; Tanwar, Shweta; Sharma, A.L.In the present paper, we have discussed the compatibility of suitable anode material with synthesized Li2MnSiO4 cathode material. The Li2MnSiO4 cathode material was synthesized by hydrothermal technique. The structural and electrochemical analysis were done by XRD, FTIR, and electrochemical measurement by cell assembly taking different materials as the anode. Cyclic voltammetry results show that cell prepared with Li2MnSiO4 as cathode and activated carbon as anode delivered a specific capacity of 53.07 mAh g?1 and graphite specific capacity of 10.21 mAh g?1 was calculated. Charge transfer resistance (Rct) of 6 and 7 ? were observed for cell with activated carbon and graphite anode respectively. Initial discharge capacity for activated carbon as an anode was recorded to be 70.54 and 3.97 mAh g?1 for anode with graphite. The results associated with activated carbon and Li2MnSiO4 as anode and cathode material appear to be compatible materials in Li-ion battery application. � 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item A critical review on orthosilicate Li2MSiO4 (M = Fe, Mn) electrode materials for Li ion batteries(Institute of Physics, 2023-05-10T00:00:00) Pateriya, Ravi Vikash; Tanwar, Shweta; Sharma, A.L.The development of novel electrode materials with good electrochemical performances is necessary for the expanded and varied applications of lithium-ion batteries, and this development heavily relies on cathode materials. Due to excellent thermal stability, abundance, low cost, and environmental friendliness, orthosilicate cathode materials Li2MSiO4 (M = Fe, Mn) has received a lot of attention recently. The present review article gives a glimpse into the characteristics, advantages, and recent progress of orthosilicate cathode materials. This review starts with a brief history and working mechanism of batteries, the advantages of cathode materials followed by types of cathode materials, various synthesis methods, and different techniques used for their characterization. The most current initiatives to enhance orthosilicate Li2MSiO4 type electrochemical performances were introduced in this review. We provide a critical assessment of the efficient modification techniques for the orthosilicate Li2MSiO4 type cathode materials in particular. These potential cathode materials� synthesis, structure, morphologies, and particularly electrochemical performances have been thoroughly examined. This evaluation, we hope, will clarify the sustained advancement of high-efficiency and reasonably priced Li-ion batteries. � 2023 IOP Publishing Ltd.Item Investigation on enhancement of electrical, dielectric and ion transport properties of nanoclay-based blend polymer nanocomposites(Springer, 2019) Arya, A; Sharma, A.L.An intercalated blend polymer nanocomposite (PNC) films based on blend (PEO–PVC), LiPF6 as salt and modified montmorillonite (MMMT) as nanoclay are prepared via solution cast method. The impact of the nanoclay on the morphology, structure, polymer–polymer, polymer–ion interactions, ionic conductivity, voltage stability window, glass transition temperature, dielectric permittivity, and ac conductivity has been explored. The structural analysis evidenced the formation of blended and intercalated polymer nanocomposites. The FTIR analysis confirmed the interaction between polymer–ion-nanoclay, and polymer intercalation is evidenced by the out-of-the-plane mode [Si–O mode] of MMMT. An increase in the fraction of free anions with clay addition is confirmed. The highest ionic conductivity of about ~ 8.2 × 10−5 S cm−1 (at RT) and 1.01 × 10−3 S cm−1 (at 100 °C) is exhibited by 5 wt% MMMT based PNC. A strong correlation is observed between the glass transition temperature, crystallinity, melting temperature (Tm), ionic conductivity, relaxation time, and dielectric strength. The dielectric data have been fitted and enhanced dielectric strength and lowering of the relaxation time (τε′andτm) with clay addition evidences the faster segmental motion of polymer chain. The intercalated PNC shows thermal stability up to ~ 300 °C, high ion transference number (~ 1), and broad voltage stability window of ~ 5 V. An absolute agreement between ion mobility (μ), diffusion coefficient (D), and ionic conductivity is observed. An ion transport mechanism has been proposed on the basis of experimental results. Therefore, the proposed PNC can be adopted as electrolyte cum separator for energy storage devices. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.