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High-Performance Biscrolled Ni-Fe Yarn Battery with Outer Buffer Layer.

Jin Hyeong Choi1, Juwan Kim1, Jun Ho Noh1,2

  • 1Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea.

International Journal of Molecular Sciences
|January 21, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a flexible Ni-Fe yarn battery using biscrolling for enhanced energy storage. This innovation offers high capacity and stability for wearable electronics.

Keywords:
Ni–Fe batteriesbiscrolled yarncarbon nanotubesdurabilityhigh load

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Growing demand for flexible and wearable electronics necessitates advanced energy storage solutions.
  • Yarn-based batteries offer a promising format but face challenges in achieving high active material loads and long cycle life.
  • Existing flexible battery technologies often compromise performance for flexibility.

Purpose of the Study:

  • To develop a stable and rechargeable aqueous Nickel-Iron (Ni-Fe) yarn battery with high energy storage performance.
  • To overcome limitations in active material loading and cycle life for flexible yarn batteries.
  • To demonstrate the potential of biscrolled yarn batteries for next-generation conformal energy solutions.

Main Methods:

  • Constructed a Ni-Fe yarn battery using a novel biscrolling technique.
  • Embedded active materials (AMs) within helical carbon nanotube (CNT) yarn structures.
  • Utilized an aqueous electrolyte for battery operation.

Main Results:

  • Achieved a high active material load (above 97 wt%) within the CNT yarn corridors.
  • Demonstrated excellent linear capacity (0.053 mAh/cm) and cycling stability (60.1% retention after 300 cycles).
  • Reported maximum energy and power densities of 422 mWh/cm³ and 7535 mW/cm³, respectively, exceeding many flexible Ni-Fe batteries.

Conclusions:

  • The biscrolled Ni-Fe yarn battery offers a promising approach for high-performance flexible energy storage.
  • This technology addresses key challenges in active material integration and long-term stability.
  • The developed yarn batteries are suitable candidates for future wearable and conformal electronic applications.