Carbon coated Li4Ti5O12 fibers: Relying on the lithium diffusivity in TiO2–B crystal structure for high rate lithium battery

Carbon-coated Li4Ti5O12 (LTO) has been prepared using polyimide (PI) as a carbon source via the thermal imidization of polyamic acid (PAA) followed by a carbonization process. In this study, the PI with different structures based on pyromellitic dianhydride (PMDA), 4,4′-oxydianiline (ODA), and p-phenylenediamine (p-PDA) moieties have been synthesized. The effect of the PI structure on the electrochemical performance of the carbon-coated LTO has been investigated. The results indicate that the molecular arrangement of PI can be improved when the rigid p-PDA units are introduced into the PI backbone. The carbons derived from the p-PDA-based PI show a more regular graphite structure with fewer defects and higher conductivity. As a result, the carbon-coated LTO exhibits a better rate performance with a discharge capacity of 137.5 mAh/g at 20 C, which is almost 1.5 times larger than that of bare LTO (94.4 mAh/g).

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Carbon-Coated Self-Assembled Ultrathin T-Nb2O5 Nanosheets for High-Rate Lithium-Ion Storage with Superior Cycling Stability

ACS Applied Energy Materials ◽

10.1021/acsaem.0c02180 ◽

2020 ◽

Vol 3 (12) ◽

pp. 12037-12045

Author(s):

Yang Li ◽

Yan Wang ◽

Guirong Cui ◽

Tianyu Zhu ◽

Jianfang Zhang ◽

...

Keyword(s):

Lithium Ion ◽

Cycling Stability ◽

High Rate ◽

Ion Storage ◽

Carbon Coated ◽

Self Assembled ◽

Superior Cycling Stability

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Effective ion pathways and 3D conductive carbon networks in bentonite host enable stable and high-rate lithium–sulfur batteries

Nanotechnology Reviews ◽

10.1515/ntrev-2021-0005 ◽

2021 ◽

Vol 10 (1) ◽

pp. 20-33

Author(s):

Lian Wu ◽

Yongqiang Dai ◽

Wei Zeng ◽

Jintao Huang ◽

Bing Liao ◽

...

Keyword(s):

Network Architecture ◽

High Performance ◽

Lithium Ion ◽

Reversible Capacity ◽

High Rate ◽

Lithium Sulfur Batteries ◽

Carbon Networks ◽

Carbon Coated ◽

Lithium Sulfur ◽

Initial Capacity

Abstract Fast charge transfer and lithium-ion transport in the electrodes are necessary for high performance Li–S batteries. Herein, a N-doped carbon-coated intercalated-bentonite (Bent@C) with interlamellar ion path and 3D conductive network architecture is designed to improve the performance of Li–S batteries by expediting ion/electron transport in the cathode. The interlamellar ion pathways are constructed through inorganic/organic intercalation of bentonite. The 3D conductive networks consist of N-doped carbon, both in the interlayer and on the surface of the modified bentonite. Benefiting from the unique structure of the Bent@C, the S/Bent@C cathode exhibits a high initial capacity of 1,361 mA h g−1 at 0.2C and achieves a high reversible capacity of 618.1 m Ah g−1 at 2C after 500 cycles with a sulfur loading of 2 mg cm−2. Moreover, with a higher sulfur loading of 3.0 mg cm−2, the cathode still delivers a reversible capacity of 560.2 mA h g−1 at 0.1C after 100 cycles.

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Crystal Orientation Tuning of LiFePO4 Nanoplates for High Rate Lithium Battery Cathode Materials

Nano Letters ◽

10.1021/nl3027839 ◽

2012 ◽

Vol 12 (11) ◽

pp. 5632-5636 ◽

Cited By ~ 244

Author(s):

Li Wang ◽

Xiangming He ◽

Wenting Sun ◽

Jianlong Wang ◽

Yadong Li ◽

...

Keyword(s):

Cathode Materials ◽

Crystal Orientation ◽

Lithium Battery ◽

High Rate ◽

Orientation Tuning

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Bimolecular-induced hierarchical nanoporous LiTi2(PO4)3/C with superior high-rate and cycling performance

Chemical Communications ◽

10.1039/c7cc04432a ◽

2017 ◽

Vol 53 (62) ◽

pp. 8703-8706 ◽

Cited By ~ 5

Author(s):

Wenwei Sun ◽

Jiehua Liu ◽

Xiaoqian Liu ◽

Xiaojing Fan ◽

Kuan Zhou ◽

...

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Hydrothermal Reaction ◽

Cycling Performance ◽

High Rate ◽

Carbon Coated

Carbon-coated hierarchical LiTi2(PO4)3 was synthesized by a facile bimolecular (glucose and DMEA) assisted hydrothermal reaction and a solid-state reaction, and exhibits excellent high-rate and cycling performance.

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