Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202009122
Keywords
anode; carbon nanotubes; lithium‐ ion batteries; metal catalyst; metal oxide
Categories
Funding
- National Natural Science Foundation of China [21978281, 21975250, 11974150]
- Independent Research Project of the State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences [110005R086]
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Designing carbon nanotubes-based materials with metal catalysts on metal oxide microparticles has led to the development of a high-performance anode for lithium-ion batteries. The anode demonstrated high capacity, extraordinary rate capabilities, and long lifespan, especially when paired with a nickel-rich cathode. The success of this study lies in the unique structure of the Co-MnO@C-CNTs anode and its compatibility with high-performance battery systems.
Designing carbon nanotubes (CNTs)-based materials are attracting great attention due to their fantastic properties and greater performance. Herein, a new CNTs network triggered by metal catalysts (e.g., Co, Ni, or Cu) is constructed on metal oxide (e.g., MnO) microparticles, giving rise to a high-performance Co-MnO@C-CNTs anode in lithium-ion batteries (LIBs). An extremely high capacity of 1050 mAh g(-1), extraordinary rate capacities over 10 A g(-1), and a long lifespan over 500 cycles are demonstrated. The great features of Co-MnO@C-CNTs anode are further confirmed in LIBs when the nickel-rich cathode (e.g., LiNi0.8Co0.1Mn0.1O2) is used and charged at a high voltage over 4.5 V. A high-capacity retention of 71.5% can be maintained at 1 C over 150 cycles. The superior performance relates to the CNTs network, which not only acts as an expressway network for fast ion/electron transportation but also buffers structural variation. Moreover, the metal nanoparticles can also enhance the electrical conductivity and catalyze the (de-)lithiation of metal oxide, resulting in higher reversibility and long-term cyclability. This study opens a new avenue to prepare CNTs-based functional materials and also explores the potential applications of metal oxide-based anode for high-performance batteries.
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