Dual carbon layer hybridized mesoporous tin hollow spheres for fast-rechargeable and highly-stable lithium-ion battery anodes

Shell spinel LiNi[Formula: see text]Mn[Formula: see text]O4 hollow microspheres were successfully synthesized by MnCO3 template, and characterized by XRD, SEM, and TEM. The results show that the hollow LiNi[Formula: see text]Mn[Formula: see text]O4 cathode has good cycle stability to reach 124.5, 119.8, and 96.6[Formula: see text]mAh/g at 0.5, 1, and 5 C, the corresponding retention rate of 98.1%, 98.2%, and 98.0% after 50 cycles at 20[Formula: see text]C, and the reversible capacity of 94.6[Formula: see text]mAh/g can be obtained at 1 C rate at 55[Formula: see text]C, 83.3% retention after 100 cycles. As the temperature decreases from 10[Formula: see text]C to [Formula: see text]C, the resistance of [Formula: see text] increases from 5.5 [Formula: see text] to 135 [Formula: see text], [Formula: see text] from 27 [Formula: see text] to 353.2 [Formula: see text], and [Formula: see text] from 12.7 [Formula: see text] to 73.0 [Formula: see text]. Moreover, the B constant and [Formula: see text] activation energy are 4480[Formula: see text]K and 37.22[Formula: see text]KJ/mol for the NTC spinel material, respectively.

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LiFe1-xMnxPO4/C COMPOSITE AS CATHODE MATERIAL FOR LITHIUM ION BATTERY

Functional Materials Letters ◽

10.1142/s1793604711002160 ◽

2011 ◽

Vol 04 (04) ◽

pp. 319-322 ◽

Cited By ~ 8

Author(s):

AI FANG LIU ◽

ZU BIAO WEN ◽

YA FEI LIU ◽

ZHONG HUA HU

Keyword(s):

Electron Microscope ◽

Electrochemical Performance ◽

Cathode Material ◽

Lithium Ion Battery ◽

Average Particle Size ◽

High Capacity ◽

Lithium Ion ◽

Carbon Layer ◽

Average Particle ◽

Charge Discharge

LiFe 1-x Mn x PO 4/ C composites were prepared as cathode material for lithium ion battery via solid-state reaction and using glucose as reducing agent and carbon source. The crystal structure and morphology were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The resultant samples were pure olivine compounds with an orthorhombic structure. Their electrochemical performance was studied by galvanostatic charge–discharge test and cyclic voltammetry. The results showed that the sample LiFe0.8Mn0.2PO4/C with an average particle size of 400 nm exhibited the largest discharge capacity of 150 mAh g-1, excellent reversibility of charge–discharge and high capacity retention of 97% after a 50-cycle CV scanning. The improved electrical conductivity corresponding to the fine carbon layer around the LiFe0.8Mn0.2PO4 individual particle can be responsible for all these excellent electrochemical performance.

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High lithium ion battery performance enhancement by controlled carbon coating of TiO2 hierarchically porous hollow spheres

RSC Advances ◽

10.1039/c6ra14895f ◽

2016 ◽

Vol 6 (74) ◽

pp. 70485-70492 ◽

Cited By ~ 2

Author(s):

Jun Jin ◽

Xiao-Ning Ren ◽

Yi Lu ◽

Xian-Feng Zheng ◽

Hong-En Wang ◽

...

Keyword(s):

Lithium Ion Battery ◽

Carbon Coating ◽

Performance Enhancement ◽

Hollow Spheres ◽

Hollow Structure ◽

Lithium Ion ◽

Carbon Layer ◽

Lithium Storage ◽

Hierarchically Porous ◽

Carbon Hollow Spheres

Hierarchical TiO2/carbon hollow spheres have been designed and prepared for enhanced lithium storage due to the synergy of the hollow structure, carbon layer and newly formed numerous ∼5 nm Li2Ti2O4 on the surface of the TiO2 nanocrystals.

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