A5089150593- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Recycling and Waste Management Techniques
- Extraction and Separation Processes
- Advanced Materials Characterization Techniques
- Fuel Cells and Related Materials
- Ferroelectric and Piezoelectric Materials
International Advanced Research Centre for Powder Metallurgy and New Materials
2018-2025
Indian Institute of Technology Madras
2024
Nickel‐rich LiNi0.8Co0.15Al0.05O2 (NCA) is a promising alternative to LiNi1‐x‐yCoxMnyO2 (NMC) with x + y ≤ 0.2, high specific energy and power density makeing it ideal for long‐range electric vehicles. However, the formation of surface residual impurities extreme sensitivity moisture detrimental large scale synthesis electrochemical performance NCA. In this paper, Li2CO3 elemental distribution lithium ions within secondary particle investigated by synthesizing different Li transition metal...
Solid polymer electrolytes (SPEs) are regarded as a superior alternative to traditional liquid of lithium-ion batteries (LIBs) due their improved safety features. The practical implementation SPEs faces challenges, such low ionic conductivity at room temperature (RT) and inadequate interfacial contact, leading high resistance across the electrode electrolyte interfaces. In this study, we addressed these issues by designing quasi-gel (QGPE), blend poly(vinylidene fluoride-
In the present work, we studied crystal phases in Li3-xNaxV2(PO4)3 system over a wide range of x prepared by four synthesis methods: mechanochemically assisted solid-state synthesis, 'soft chemistry' sol-gel approach, chemical (CIE) and electrochemical (EIE) ion exchange starting from Li3V2(PO4)3 (anti-NASICON, P21/c S.G.), Na3V2(PO4)3 (NASICON, C2/c S.G.). EIE was operando ex situ XRD vs Na Li cells. It shown that both methods do not result single-phase Na3-xLixV2(PO4)3. contrast, CIE lead...
TiNb2O7/carbon nanocomposites synthesized through a simple, surfactant assisted precursor route is reported as promising alternative anode material for lithium-ion batteries (LIBs). The carbon component of the derived from an inexpensive and sustainable keratin rich biological source. reinforcement in TiNb2O7 facilitated formation non-stoichiometric (Ti0.712Nb0.288)O2 crystalline phase, addition to stoichiometric phase. It also yielded high specific surface area (~90 m2 g−1) reduced...
The electrochemical performance of the lithium-ion battery is significantly affected by choice electrode conductive additives. In this study, a mixed additive with an equal proportion multilayer-graphene (MLG) and carbon black (CB) used in LiNi1/3Mn1/3Co1/3O2 (NMC-CB-MLG) electrodes. these electrodes compared at coin cell pouch formats that (NMC) prepared CB alone as (NMC-CB). While independently increases rate capability, mixing MLG enhances cycling stability. cells fabricated using...
LiNi1-x-yCoxAlyO2 (NCA) possessing a nano-/micro hierarchical architecture delivers high specific capacity of 200 mAh/g with an upper cutoff voltage 4.4 V. However, the structural reconstruction due to irreversibility H2 ↔ H3 phase transition at higher increases initial irreversible loss and charge-transfer impedance reduces performance C-rates. Structural electrochemical stability can be achieved by reducing nickel content increasing electrochemically inactive aluminum surface. Nonetheless,...
Substitution of aluminum in nickel-rich layered oxides plays a vital role structural and thermal stability. Hence comprehension distribution such as LiNi0.8Co0.15Al0.05O2 (LNCA) is crucial. However, investigation LNCA extremely challenging, sophisticated techniques 27Al 7Li MAS NMR, individual atom probe tomography, X-ray neutron diffraction, SQUID magnetic susceptibility measurements are recently employed. We demonstrate the use combination versatile energy dispersive analysis mapping,...
The performance of lithium-ion batteries depends on the morphology and distribution components in electrode. LiNi 1 −x−y Mn x Co y O 2 (NMC) with nano-micro hierarchical structure is a commercially important cathode material for electric vehicle application. commonly used slurry preparation method to dry-mix active conductive additive then disperse it binder solution. energy imparted during premixing, while helping controlling CB establish conducting network, can deteriorate NMC by...
The electrochemical performance of lithium ion battery (LIB) mainly depends on structural integrity active materials and stability electrode/electrolyte interface. theoretical values such as cell potential, specific capacity the energy density LIB characteristics material. practical capacity, density, cycle life rate capability extrinsic properties electrode microstructure i.e., adhesion cohesion electrode, coating thickness its porosity interfaces between various components cell. Aim this...