Germanium quantum dots embedded in N-doping graphene matrix with sponge-like architecture for enhanced performance in lithium-ion batteries

Autor:	Minhua Cao, Jinwen Qin, Changwen Hu, Xia Wang
Rok vydání:	2014
Předmět:	Graphene Organic Chemistry Doping Oxide chemistry.chemical_element Nanotechnology Germanium General Chemistry Catalysis Anode law.invention chemistry.chemical_compound Chemical engineering chemistry Quantum dot law Electrode Lithium
Zdroj:	Chemistry (Weinheim an der Bergstrasse, Germany). 20(31)
ISSN:	1521-3765
Popis:	Germanium quantum dots embedded in a nitrogen-doped graphene matrix with a sponge-like architecture (Ge/GN sponge) are prepared through a simple and scalable synthetic method, involving freeze drying to obtain the Ge(OH)4 /graphene oxide (GO) precursor and subsequent heat reduction treatment. Upon application as an anode for the lithium-ion battery (LIB), the Ge/GN sponge exhibits a high discharge capacity compared with previously reported N-doped graphene. The electrode with the as-synthesized Ge/GN sponge can deliver a capacity of 1258 mAh g(-1) even after 50 charge/discharge cycles. This improved electrochemical performance can be attributed to the pore memory effect and highly conductive N-doping GN matrix from the unique sponge-like structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7123b44e1c22b817819e48496c794ec6 https://pubmed.ncbi.nlm.nih.gov/25043714 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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