Uniform Mesoporous CoCO3 Nanospindles on Graphite Nanosheets for Highly Efficient Lithium Storage

Su，Liwei1; Zhao，Yizhe1; Li，Zhemin1; Hei，Jinpei1; Chen，Huan1; Wang，Lianbang1; Wang，Yuanhao2; Ren，Manman3

2020

10.1002/ppsc.202000113

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION   影响因子和分区

0934-0866

1521-4117

As anodes for lithium-ion batteries, CoCO has a much higher specific capacity than graphite and can meet the urgent demands of electric vehicles and portable electronics. However, reported CoCO anodes are of micrometer-sized morphology (0.4–10 µm) that severely limits long-term and rate performances (in particular >2.0 A g) due to intrinsically low conductivity and high volume expansion. Mesoporous materials have uniform open mesopores to offer sufficient solid/electrolyte contact, rapid Li transport, and large pore volume. However, it is still challenging to prepare uniform mesoporous CoCO nanostructures. This work reports a urea–NHHCO–ethylene glycol (EG) solvothermal system to fabricate uniform mesoporous CoCO nanospindles and concurrently composite with multilayered graphite nanosheets. The obtained mesoporous CoCO has a specific surface area of 143.7 m g, 12.4 times that of commercial CoCO. The preparation mechanism is studied in-depth, where urea, NHHCO, EG, and crystal water play essential and respective roles. The synergistic effect of the mesopore and graphite nanosheets facilitates long-term cycling stability (1465 mAh g after 450 cycles at 200 mA g with 101.1% capacity retention) and high-rate performance (1033 mAh g at 2.0 A g). The essential roles of mesopores and graphite nanosheets in boosting the kinetic change are investigated.

graphite nanosheets lithium-ion batteries mesoporous materials metal carbonates solvothermal reactions

SCI ; EI

英语

其他

Natural Science Foundation of Zhejiang Province[LGG18B030001][LGG20B030002] ; Key Research and Development Program of Science and Technology Department of Zhejiang Province[2017C01023] ; National Natural Science Foundation of China[61705258]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000537752300001

WILEY-V C H VERLAG GMBH

20202308801507

Ethylene glycol ; Cobalt compounds ; Mesoporous materials ; Metabolism ; Morphology ; Nanosheets ; Urea ; Graphite ; Ethylene ; Anodes

Electron Tubes:714.1 ; Nanotechnology:761 ; Organic Compounds:804.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85085944359

Scopus

1.State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology,College of Chemical Engineering,Zhejiang University of Technology,Hangzhou,310014,China
2.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Institute of Materials Science and Engineering,Qilu University of Technology,Jinan,250353,China

Su，Liwei,Zhao，Yizhe,Li，Zhemin,et al. Uniform Mesoporous CoCO3 Nanospindles on Graphite Nanosheets for Highly Efficient Lithium Storage[J]. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION,2020,37(7).

Su，Liwei.,Zhao，Yizhe.,Li，Zhemin.,Hei，Jinpei.,Chen，Huan.,...&Ren，Manman.(2020).Uniform Mesoporous CoCO3 Nanospindles on Graphite Nanosheets for Highly Efficient Lithium Storage.PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION,37(7).

Su，Liwei,et al."Uniform Mesoporous CoCO3 Nanospindles on Graphite Nanosheets for Highly Efficient Lithium Storage".PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION 37.7(2020).