---
_id: '15314'
abstract:
- lang: eng
  text: Development of electroactive materials exhibiting high performance with superior
    stability is crucial in the field of supercapacitors and battery research. We
    report on synthesis of highly stable composite of semi-polycrystalline polyaniline
    and graphene (SPani-graphene) and its application in supercapacitor electrodes.
    The electrochemical behavior and device performance of the electrodes were investigated
    through cyclic voltammetry (CV), galvanostatic charge-discharge GCD) and electrochemical
    impedance spectroscopy (EIS) in a 3-electrode and a 2-electrode (device) cell
    configurations, repectively. The cell specific capacitance (Cell Csp) achieved
    from the 2-electrode symmetric cell configuration was 525.5 F g−1 at 0.1 A g−1
    using polymer gel electrolyte (PGE). The PGE in this work is xanthan gum jellied
    in 1 M aq. Na2SO4. The maximum energy density and power density achieved from
    the device was 46.7 Wh kg−1 and 16.16 kW kg−1, respectively, at 0.4 A g−1. Furthermore,
    the device exhibits an excellent retention of cell specific capacitance and coulombic
    efficiency of 97 % and 94 %, respectively, over 10,000 continuous GCD cycles,
    indicating an excellent rate capability as well as a promising power management.
    To investigate the material's electrochemical durability, a detailed EIS study
    has been carried out using both, 3-electrode, and 2-electrode cell configurations,
    before and after long cycling test (over 10,000 continuous GCD cycles). Our thorough
    experimentation delivers satisfactory results and has been explained in detail
    in the manuscript. Hereby, we propose that the EIS technique can be adopted for
    investigating materials' electrochemical stability, in addition to long CV and
    GCD cycles in the field of supercapacitors and battery research.
acknowledgement: "This work was supported by Korea Institute of Energy Technology
  Evaluation and Planning (KETEP); and Ministry of Trade, Industry & Energy (MOTIE),
  Republic of Korea (Grant No. \r\n20210501010020)."
article_number: '111464'
article_processing_charge: No
article_type: original
author:
- first_name: Neelima
  full_name: Mahato, Neelima
  last_name: Mahato
- first_name: Saurabh
  full_name: Singh, Saurabh
  id: 12d625da-9cb3-11ed-9667-af09d37d3f0a
  last_name: Singh
  orcid: 0000-0003-2209-5269
- first_name: T. V.M.
  full_name: Sreekanth, T. V.M.
  last_name: Sreekanth
- first_name: Kisoo
  full_name: Yoo, Kisoo
  last_name: Yoo
- first_name: Jonghoon
  full_name: Kim, Jonghoon
  last_name: Kim
citation:
  ama: 'Mahato N, Singh S, Sreekanth TVM, Yoo K, Kim J. Polycrystalline phases engineered
    in-situ in polyaniline-graphene composite evoluting an exceptional stability and
    high charge storage capacity: An EIS investigative approach to evaluate material’s
    stability. <i>Journal of Energy Storage</i>. 2024;88. doi:<a href="https://doi.org/10.1016/j.est.2024.111464">10.1016/j.est.2024.111464</a>'
  apa: 'Mahato, N., Singh, S., Sreekanth, T. V. M., Yoo, K., &#38; Kim, J. (2024).
    Polycrystalline phases engineered in-situ in polyaniline-graphene composite evoluting
    an exceptional stability and high charge storage capacity: An EIS investigative
    approach to evaluate material’s stability. <i>Journal of Energy Storage</i>. Elsevier.
    <a href="https://doi.org/10.1016/j.est.2024.111464">https://doi.org/10.1016/j.est.2024.111464</a>'
  chicago: 'Mahato, Neelima, Saurabh Singh, T. V.M. Sreekanth, Kisoo Yoo, and Jonghoon
    Kim. “Polycrystalline Phases Engineered In-Situ in Polyaniline-Graphene Composite
    Evoluting an Exceptional Stability and High Charge Storage Capacity: An EIS Investigative
    Approach to Evaluate Material’s Stability.” <i>Journal of Energy Storage</i>.
    Elsevier, 2024. <a href="https://doi.org/10.1016/j.est.2024.111464">https://doi.org/10.1016/j.est.2024.111464</a>.'
  ieee: 'N. Mahato, S. Singh, T. V. M. Sreekanth, K. Yoo, and J. Kim, “Polycrystalline
    phases engineered in-situ in polyaniline-graphene composite evoluting an exceptional
    stability and high charge storage capacity: An EIS investigative approach to evaluate
    material’s stability,” <i>Journal of Energy Storage</i>, vol. 88. Elsevier, 2024.'
  ista: 'Mahato N, Singh S, Sreekanth TVM, Yoo K, Kim J. 2024. Polycrystalline phases
    engineered in-situ in polyaniline-graphene composite evoluting an exceptional
    stability and high charge storage capacity: An EIS investigative approach to evaluate
    material’s stability. Journal of Energy Storage. 88, 111464.'
  mla: 'Mahato, Neelima, et al. “Polycrystalline Phases Engineered In-Situ in Polyaniline-Graphene
    Composite Evoluting an Exceptional Stability and High Charge Storage Capacity:
    An EIS Investigative Approach to Evaluate Material’s Stability.” <i>Journal of
    Energy Storage</i>, vol. 88, 111464, Elsevier, 2024, doi:<a href="https://doi.org/10.1016/j.est.2024.111464">10.1016/j.est.2024.111464</a>.'
  short: N. Mahato, S. Singh, T.V.M. Sreekanth, K. Yoo, J. Kim, Journal of Energy
    Storage 88 (2024).
date_created: 2024-04-14T22:01:01Z
date_published: 2024-05-30T00:00:00Z
date_updated: 2025-09-04T13:38:27Z
day: '30'
department:
- _id: MaIb
doi: 10.1016/j.est.2024.111464
external_id:
  isi:
  - '001287584100001'
intvolume: '        88'
isi: 1
language:
- iso: eng
month: '05'
oa_version: None
publication: Journal of Energy Storage
publication_identifier:
  eissn:
  - 2352-152X
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Polycrystalline phases engineered in-situ in polyaniline-graphene composite
  evoluting an exceptional stability and high charge storage capacity: An EIS investigative
  approach to evaluate material''s stability'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 88
year: '2024'
...