Lithium-ion capacitor based on nanoarchitectured polydopamine/graphene composite anode and porous graphene cathode

Yuqi Yang, Qingyang Lin, Bing Ding, Jie Wang, Victor Malgras, Jiangmin Jiang, Zhiwei Li, Shuang Chen, Hui Dou, Saad M. Alshehri, Tansir Ahamad, Jongbeom Na, Xiaogang Zhang, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Developing lithium ion capacitors (LICs) with high energy density is still challenging, due to the kinetic mismatch between the capacitor-type cathode and the battery-type anode. In addition, metal-free LICs are preferred over high-cost and unsustainable metal-containing electrode materials. Exploring appropriate metal-free cathode and anode materials with high capacity and excellent rate performance is one of the keys to attain such goal. Herein, nanoarchitectured graphene-based LICs are successfully constructed by using 2D polydopamine-graphene heterostructured anode and porous graphene cathode. The 2D nature of polydopamine-graphene facilitate the transport of electrolyte ions while graphene promotes electron transfer. The high specific surface area of the porous graphene endows ions with accessibility and fast transport. The metal-free LIC device achieves a high energy density (135.6 Wh kg−1 at 210.4 W kg−1), high power density (21.0 kW kg−1 at 78.9 Wh kg−1), high low-temperature performance (76.4 Wh kg−1 at −20 °C), and reasonably long cycling life. This work provides an effective strategy to design metal-free LIC with high performance at wide temperature range.

Original languageEnglish
Pages (from-to)627-633
Number of pages7
JournalCarbon
Volume167
DOIs
Publication statusPublished - 2020 Oct 15
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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