ORCID Profile
0000-0003-2335-7144
Current Organisations
Indian Institute of Technology Delhi
,
University of Queensland
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Publisher: Wiley
Date: 05-07-2022
Abstract: The electrode–electrolyte interface is one of the major components enabling Li‐ion batteries (LIBs) to function reversibly. Often, the solid–electrolyte interphase (SEI) at the anode is regarded as the key interface that determines the cycle life, capacity fade, and overall safety of batteries. There are a plethora of SEI literatures that exist however, the cathode–electrolyte interphase (CEI) remains relatively unexplored. Unlike in the case of SEI, a detailed understanding of CEI formation and its association with battery performance is not present. This review gives insight into the recent progress in understanding the CEI in LIBs. Though there is a relative dearth of literature, the CEI is generally considered as a heterogeneous multicomponent film formed due to the decomposition of electrolyte at the cathode surface. Besides understanding the thermodynamic properties and relevant kinetic reactions, one of the main challenges lies in developing and stabilizing the CEI layer due to its complex structural composition. Extensive research efforts to engineer a stable CEI are reviewed, including the use of electrolyte additives, artificial engineering, and heteroatom doping of cathode. Furthermore, promising characterization techniques and future outlook in forming a robust CEI for both existing LIB and post‐LIB systems are highlighted.
Publisher: Informa UK Limited
Date: 20-10-2020
Publisher: Springer Science and Business Media LLC
Date: 24-08-2022
Publisher: Wiley
Date: 21-10-2022
Abstract: An ordered and homogeneous deposition of sodium metal is pivotal in achieving reversible and long‐term stability of the metal battery. The sodium deposition critically depends on the local interfacial properties of the anode/electrolyte interface. Due to the hostless nature of sodium metal anode, the integrity of the interface deteriorates rapidly, leading to a rise in stripping lating overpotential or premature cell failure. Herein, well‐ordered microarchitectures of carbon nanotubes (MACNTs) as a potential host for reversible and highly stable stripping lating of sodium metal are reported. Besides accommodating sodium metal, the MACNT host facilitates the formation of inorganic‐rich solid–electrolyte interphase over the sodium metal anode. As a result, it can achieve stripping lating reversibility for 1200 h at a current of 1 mA cm −2 . An overpotential of about 30 mV occurs for the stripping lating process, indicating uniform and compact deposition of sodium. Moreover, when applying to a room‐temperature Na–FeS 2 battery, the MACNT host achieves stable cycling for over 200 cycles at 200 mA g −1 and delivers a capacity of about 210 mA h g −1 .
Publisher: Informa UK Limited
Date: 17-02-2021
Publisher: Elsevier BV
Date: 2022
Publisher: Elsevier BV
Date: 11-2023
Publisher: Elsevier BV
Date: 12-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2MA00428C
Abstract: Solid electrolytes for room-temperature sodium–sulfur batteries have gained acceptance considering the advantages of safety, mitigating the polysulfide shuttling, stable cycling and mechanical property, which suppresses dendrite proliferation.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1MA00841B
Abstract: Greener methods for the extraction and isolation of tannin, and it's state of art in adhesive technology.
Publisher: Wiley
Date: 19-11-2021
Abstract: The increased demand for energy has prompted users to seek alternative energy storage devices. Post‐Li‐ion battery chemistries have been considered potential contenders for the development of next‐generation battery technologies. The high specific capacity (≈1675 mAh g −1 ) and high natural abundance (≈953 ppm) of sulfur provide opportunities to meet the rigorous requirements of the market's demands, such as high energy density and low cost. When combined with a high capacity metal anode (e.g., Na ≈ 1165 mAh g −1 , Mg ≈ 2205 mAh g −1 , and Al ≈2980 mAh g −1 ), it leads to high energy density that can outperform the existing battery technologies, including high‐energy Li‐ion batteries. Despite the unique attributes of the sulfur‐based battery system, it remains in infancy owing to the complex reaction chemistry of sulfur cathode, and the level of complexity increases with an increase in valency of metal ions. This review summarizes the unique aspects of a sulfur cathode essential to stabilizing sulfur cathode‐based high‐energy rechargeable batteries. Furthermore, deeper insight into the electrochemical performance of various metal–sulfur‐based systems has been provided. This review may pave the path for the researchers to accelerate the development of sulfur cathode for post‐Li‐ion batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1MA00247C
Abstract: The physiochemical aspects of the matrix play an important role in deciding the loading of sulfur cathodes.
Publisher: Elsevier BV
Date: 07-2023
Publisher: Wiley
Date: 19-07-2021
DOI: 10.1002/EST2.264
Abstract: Post‐Li ion battery technologies are gaining importance due to their high theoretical energy density and high specific capacity of the electrode materials. Due to fundamental limitations, the existing Li‐ion batteries cannot fulfill rigorous requirements, like cost‐effectiveness and high storage capacities. Room‐temperature sodium‐sulfur battery (RT‐Na/S), in particular, is an emerging candidate with the high theoretical specific capacity of sodium (~1166 mAh/g) and sulfur (~1675 mAh/g) and naturally high abundance of both the electrode materials. Sodium metal, combined with sulfur, is a cheap and energy‐dense option to the existing battery technologies. In recent years, this has garnered much interest in the scientific community due to a wide range of possibilities for altering battery performance. With the invention of the high‐temperature sodium‐sulfur batteries, Na metal‐based chemistries remain in oblivion. However, due to increasing concerns over the safety of high‐temperature sodium‐sulfur batteries, Na metal anode is revived in recent years with the ever‐growing demands for high energy density and improved safety. Despite that current Na metal anode still lacks high‐reversibility, efficiency, and room‐temperature stability due to limited or no control over the interfacial chemistry of the Na metal anode. The electrochemical reduction of Na + ions is accompanied by the inevitable reduction of organic species, which leads to the growth of the solid‐electrolyte interphase (SEI) with Na‐deposits. The SEI is inherently unstable due to the localized fluctuations in its chemical and physical properties. A deep understanding of challenges associated with the SEI's localized interfacial chemistry is of prime importance toward developing practical Na metal anodes for RT‐Na/S batteries. This minireview highlights critical challenges in developing a stable Na metal anode and further sheds light on its mechanistic aspects. In addition to that, novel approaches to precisely tune the interphase's physicochemical properties are highlighted to pave path for developing a stable and long‐life Na‐metal anode for RT‐Na/S batteries.
Publisher: Springer Science and Business Media LLC
Date: 12-11-2022
Publisher: Elsevier
Date: 2023
Publisher: Informa UK Limited
Date: 2020
Publisher: Elsevier BV
Date: 2020
Publisher: American Association for the Advancement of Science (AAAS)
Date: 13-05-2022
Abstract: A reliable energy storage ecosystem is imperative for a renewable energy future, and continued research is needed to develop promising rechargeable battery chemistries. To this end, better theoretical and experimental understanding of electrochemical mechanisms and structure-property relationships will allow us to accelerate the development of safer batteries with higher energy densities and longer lifetimes. This Review discusses the interplay between theory and experiment in battery materials research, enabling us to not only uncover hitherto unknown mechanisms but also rationally design more promising electrode and electrolyte materials. We examine specific case studies of theory-guided experimental design in lithium-ion, lithium-metal, sodium-metal, and all-solid-state batteries. We also offer insights into how this framework can be extended to multivalent batteries. To close the loop, we outline recent efforts in coupling machine learning with high-throughput computations and experiments. Last, recommendations for effective collaboration between theorists and experimentalists are provided.
Publisher: Springer Singapore
Date: 2021
Publisher: Springer Science and Business Media LLC
Date: 04-03-2023
No related grants have been discovered for Vineeth S. K..