In situ fabrication of ultrathin few-layered WSe2 anchored on N, P dual-doped carbon by bioreactor for half/full sodium/potassium-ion batteries with ultralong cycling lifespan

Biyu Kang; Xiaochuan Chen; Lingxing Zeng; Fenqiang Luo; Xinye Li; Lihong Xu; Min-Quan Yang; Qinghua Chen; Mingdeng Wei; Qingrong Qian

doi:10.1016/j.jcis.2020.04.055

In situ fabrication of ultrathin few-layered WSe₂ anchored on N, P dual-doped carbon by bioreactor for half/full sodium/potassium-ion batteries with ultralong cycling lifespan

J Colloid Interface Sci. 2020 Aug 15:574:217-228. doi: 10.1016/j.jcis.2020.04.055. Epub 2020 Apr 13.

Authors

Affiliations

¹ Engineering Research Center of Polymer Green Recycling of Ministry of Education, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China.
² Engineering Research Center of Polymer Green Recycling of Ministry of Education, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China. Electronic address: zenglingxing@fjnu.edu.cn.
³ Engineering Research Center of Polymer Green Recycling of Ministry of Education, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China; Fuqing Branch of Fujian Normal University, Fuqing, Fujian 350300, China.
⁴ Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fuzhou, Fujian 350002, China.
⁵ Engineering Research Center of Polymer Green Recycling of Ministry of Education, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China. Electronic address: qrqian@fjnu.edu.cn.

PMID: 32325287
DOI: 10.1016/j.jcis.2020.04.055

Abstract

Sodium/potassium-ion batteries (SIBs/PIBs) with high electrochemical performance are promising but there still remain daunting challenges to explore an anode material with appealing cycling stability and rate capability. In addition, the utilization of waste biomass arouses tremendous researches in energy storage applications. Herein, we elaborately coupling ultrathin few-layered WSe₂ nanosheets with N, P-doped biochar by utilizing waste chlorella as adsorbent and reactor. It displays a prominent long-term cycling property (265 mAh g^-1 at 1 A g^-1 up to 1500 cycles) in SIBs, which is the best long-cycle performance ever reported for WSe₂. Paired with Na₃V₂(PO₄)₃ cathode, full SIBs also exhibit superior capacity of 210 mAh g^-1 at 0.5 A g^-1 for 120 cycles. Notably, we also report WSe₂-based anode material in PIBs, which delivers a high capacity of 333 mAh g^-1 at 0.1 A g^-1 for 100 cycles and superior cycling lifespan (155 mAh g^-1 at 1 A g^-1 up to 5300 cycles) as well as excellent rate properties. Additionally, the mechanism of the repeated process of sodiation/desodiation is revealed, by the deep characterization, such as ex-situ XRD/Raman, galvanostatic intermittent titration technique and CV measurements.

Keywords: Chlorella-derived carbon; Dichalcogenides; Few-layered; Sodium/potassium-ion batteries; WSe(2).