Chiang Mai University; Chiang Mai University; Lampang Rajabhat University; National Science & Technology Development Agency - Thailand; National Metal & Materials Technology Center (MTEC); Fudan University; National Institute for Materials Science; Kyoto University; Chiang Mai University; Chiang Mai University
Type
Article
Source Title
CRYSTALS
Year
2021
Volume
11
Issue
12
Open Access
gold
Publisher
MDPI
DOI
10.3390/cryst11121582
Format
PDF
Abstract
This work aimed to design a facile preparation of sandwich-liked Ge nanoparticles/nitrogen-doped reduced graphene oxide (Ge/NrGO) nanocomposites used as anode in lithium-ion batteries through the chemical solution route. The advanced electron microscopy, STEM-HAADF and STEM-EDS mapping, evidenced that the individual Ge particles with sizes ranging from 5 to 20 nm were distributed and wrapped as sandwiches within the multi-layered NrGO sheets, which were mainly composed of the pyridinic-N form (4.8%wt.). The battery performances of the 20Ge/NrGO nanocomposite anode exhibit a high reversible capacity (700 mAh g(-1)) and retained its outstanding stability during long-term cycling. The internal resistance (28.0 omega) was also decreased after cycling, according to EIS measurement. The sandwiched structure of Ge-based nanocomposite with the interconnected NrGO layers discussed in this article possessed the high-performance LIBs with great potential application in energy storage technologies.
TSRI; Program Management Unit for Human Resources and Institutional Development, Research and Innovation; Office of National Higher Education Science Research and Innovation Policy Council (NXPO) in Global Partnership Project [B16F640001]; Collaborative Research Program of Institute for Chemical Research, Kyoto University [2021-122]
