title: Amorphous ZnO Quantum Dot/Mesoporous Carbon Bubble Composites for a High-Performance Lithium-Ion Battery Anode.
abstract: Due to its high theoretical capacity (978 mA h g-1), natural abundance, environmental friendliness, and low cost, zinc oxide is regarded as one of the most promising anode materials for lithium-ion batteries (LIBs). A lot of research has been done in the past few years on this topic. However, hardly any research on amorphous ZnO for LIB anodes has been reported despite the fact that the amorphous type could have superior electrochemical performance due to its isotropic nature, abundant active sites, better buffer effect, and different electrochemical reaction details. In this work, we develop a simple route to prepare an amorphous ZnO quantum dot (QDs)/mesoporous carbon bubble composite. The composite consists of two parts: mesoporous carbon bubbles as a flexible skeleton and monodisperse amorphous zinc oxide QDs (smaller than 3 nm) encapsulated in an amorphous carbon matrix as a continuous coating tightly anchored on the surface of mesoporous carbon bubbles. With the benefits of abundant active sites, amorphous nature, high specific surface area, buffer effect, hierarchical pores, stable interconnected conductive network, and multidimensional electron transport pathways, the amorphous ZnO QD/mesoporous carbon bubble composite delivers a high reversible capacity of nearly 930 mA h g-1(at current density of 100 mA g-1) with almost 90% retention for 85 cycles and possesses a good rate performance. This work opens the possibility to fabricate high-performance electrode materials for LIBs, especially for amorphous metal oxide-based materials.
authors.affiliation: The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University , Guangzhou 510275, People's Republic of China.
authors.forename: Zhiming
authors.identifier: http://orcid.org/0000-0001-6508-3247
authors.initials: Z
authors.lastname: Tu
authors.affiliation: The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University , Guangzhou 510275, People's Republic of China.
authors.forename: Gongzheng
authors.identifier: http://orcid.org/0000-0001-9193-7437
authors.initials: G
authors.lastname: Yang
authors.affiliation: The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University , Guangzhou 510275, People's Republic of China.
authors.forename: Huawei
authors.identifier: http://orcid.org/0000-0001-9091-2297
authors.initials: H
authors.lastname: Song
authors.affiliation: The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University , Guangzhou 510275, People's Republic of China.
authors.forename: Chengxin
authors.identifier: http://orcid.org/0000-0001-8355-6431
authors.initials: C
authors.lastname: Wang
keywords: amorphous metal oxide-based materials; high-performance electrode; lithium-ion batteries; quantum dots; zinc oxide