Li alloy-based non-volatile actuators

Myoung Sub Noh, Hyunseok Lee, Young Geun Song, Inki Jung, Ruiguang Ning, Sung Wook Paek, Hyun Cheol Song, Seung Hyub Baek, Chong-Yun Kang, Sangtae Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Conventional artificial muscles induce bending by aligning large-sized ions within the electrolyte upon bias application. Such design, alike many other actuator types, suffer from volatile actuation where the actuated position gets lost upon switch-off. Here, we develop a non-volatile artificial muscle with ion insertion electrode materials. Upon bias application, the inserted ions pose stress on the electrodes that sustain even after power shut-off. The demonstrated actuator consists of lithium germanide (LixGe) thin films deposited on both sides of a flexible polyimide (PI) substrate. The device exhibits 35.2 mm displacement when operated at 2 V and generates the blocking force of 0.67 mN. The observed stress and volume expansion reach 248 MPa and 8.2% for the 284 nm Li3Ge thin films, respectively. The actuated position is maintained against gravity with 12.1% decay in the actuated distance after 10 min. The novel actuator type proves the potential use of lithium insertion materials as actuation materials and shows that non-volatile actuation can be realized with ion-insertion electrodes.

Original languageEnglish
Pages (from-to)653-659
Number of pages7
JournalNano Energy
Volume57
DOIs
Publication statusPublished - 2019 Mar 1

Fingerprint

Actuators
Ions
Lithium
Electrodes
Muscle
Thin films
Heavy ions
Polyimides
Electrolytes
Gravitation
Switches
Substrates

Keywords

  • Artificial Muscles
  • Electrochemistry
  • Li Alloys
  • Non-Volatile Actuation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Noh, M. S., Lee, H., Song, Y. G., Jung, I., Ning, R., Paek, S. W., ... Kim, S. (2019). Li alloy-based non-volatile actuators. Nano Energy, 57, 653-659. https://doi.org/10.1016/j.nanoen.2018.12.095

Li alloy-based non-volatile actuators. / Noh, Myoung Sub; Lee, Hyunseok; Song, Young Geun; Jung, Inki; Ning, Ruiguang; Paek, Sung Wook; Song, Hyun Cheol; Baek, Seung Hyub; Kang, Chong-Yun; Kim, Sangtae.

In: Nano Energy, Vol. 57, 01.03.2019, p. 653-659.

Research output: Contribution to journalArticle

Noh, MS, Lee, H, Song, YG, Jung, I, Ning, R, Paek, SW, Song, HC, Baek, SH, Kang, C-Y & Kim, S 2019, 'Li alloy-based non-volatile actuators', Nano Energy, vol. 57, pp. 653-659. https://doi.org/10.1016/j.nanoen.2018.12.095
Noh MS, Lee H, Song YG, Jung I, Ning R, Paek SW et al. Li alloy-based non-volatile actuators. Nano Energy. 2019 Mar 1;57:653-659. https://doi.org/10.1016/j.nanoen.2018.12.095
Noh, Myoung Sub ; Lee, Hyunseok ; Song, Young Geun ; Jung, Inki ; Ning, Ruiguang ; Paek, Sung Wook ; Song, Hyun Cheol ; Baek, Seung Hyub ; Kang, Chong-Yun ; Kim, Sangtae. / Li alloy-based non-volatile actuators. In: Nano Energy. 2019 ; Vol. 57. pp. 653-659.
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