scholarly journals Improving Lithium‐Ion Diffusion Kinetics in Nano‐Si@C Anode Materials with Hierarchical MoS 2 Decoration for High‐Performance Lithium‐Ion Batteries

2021 ◽  
Author(s):  
Xiongbiao Ye ◽  
Chuanhai Gan ◽  
Liuqing Huang ◽  
Yiwei Qiu ◽  
Ying Xu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Diffusion Kinetics ◽  
Ion Diffusion ◽  
Lithium Ion Diffusion

Ti3C2Tx-Based Electrodes with Enhanced Pseudocapacitance for High-Performance Lithium-ion Batteries

NANO ◽  
2020 ◽  
Vol 15 (04) ◽  
pp. 2050051
Author(s):  
Rudong Zheng ◽  
Lili Wu ◽  
Jiabao Zhao ◽  
Chuncheng Zhu ◽  
Hong Gao
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Kinetic Mechanism ◽  
Ion Diffusion ◽  
Two Samples ◽  
New Type ◽  
Current Densities ◽  
Lithium Ion Diffusion

Ti3C2Tx, a new type of two-dimensional material, is a prospective anode material in lithium-ion batteries (LIBs) for its low lithium-ion diffusion barrier, high conductivity and many other excellent properties. In this paper, multilayer Ti3C2Tx and delaminated Ti3C2Tx samples are prepared by etching Ti3AlC2 powder with HF and [Formula: see text], respectively. We explore the application of the two samples in LIBs, and analyze their electrochemical behavior and kinetic mechanism. At the current densities of 0.1[Formula: see text]A[Formula: see text]g[Formula: see text], the delaminated Ti3C2Tx electrode delivered higher capacities of 255[Formula: see text]mAh[Formula: see text]g[Formula: see text] than multilayer Ti3C2Tx electrode (100[Formula: see text]mAh[Formula: see text]g[Formula: see text]). Even after 1000 cycles, the specific capacity of the delaminated Ti3C2Tx is still up to 205[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]. This work proves the great potential of the delaminated Ti3C2Tx for lithium-ion storage.

scholarly journals Lithium Distribution in Structured Graphite Anodes Investigated by Laser-Induced Breakdown Spectroscopy

2019 ◽  
Vol 9 (20) ◽  
pp. 4218 ◽  
Author(s):  
Yijing Zheng ◽  
Lisa Pfäffl ◽  
Hans Jürgen Seifert ◽  
Wilhelm Pfleging
Keyword(s):  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Laser Induced Breakdown Spectroscopy ◽  
Diffusion Kinetics ◽  
Ion Diffusion ◽  
Graphite Electrodes ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Lithium Ion Diffusion

For the development of thick film graphite electrodes, a 3D battery concept is applied, which significantly improves lithium-ion diffusion kinetics, high-rate capability, and cell lifetime and reduces mechanical tensions. Our current research indicates that 3D architectures of anode materials can prevent cells from capacity fading at high C-rates and improve cell lifespan. For the further research and development of 3D battery concepts, it is important to scientifically understand the influence of laser-generated 3D anode architectures on lithium distribution during charging and discharging at elevated C-rates. Laser-induced breakdown spectroscopy (LIBS) is applied post-mortem for quantitatively studying the lithium concentration profiles within the entire structured and unstructured graphite electrodes. Space-resolved LIBS measurements revealed that less lithium-ion content could be detected in structured electrodes at delithiated state in comparison to unstructured electrodes. This result indicates that 3D architectures established on anode electrodes can accelerate the lithium-ion extraction process and reduce the formation of inactive materials during electrochemical cycling. Furthermore, LIBS measurements showed that at high C-rates, lithium-ion concentration is increased along the contour of laser-generated structures indicating enhanced lithium-ion diffusion kinetics for 3D anode materials. This result is correlated with significantly increased capacity retention. Moreover, the lithium-ion distribution profiles provide meaningful information about optimizing the electrode architecture with respect to film thickness, pitch distance, and battery usage scenario.

scholarly journals A novel method for preparing α-LiFeO2 nanorods for high-performance lithium-ion batteries

Ionics ◽  
2019 ◽  
Vol 26 (2) ◽  
pp. 1057-1061
Author(s):  
Youzuo Hu ◽  
Xingquan Liu
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Performance ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Novel Method ◽  
Lithium Ion Diffusion

AbstractOne-dimensional (1D) α-LiFeO2 nanorods are successfully prepared via a low-temperature solid-state reaction from α-FeOOH nanorods synthesized by hydrothermal process and used as cathode materials in lithium-ion batteries. As cathode material for lithium-ion batteries, the nanorods can achieve a high initial specific capacity of 165.85 mAh/g at 0.1 C for which a high capacity retention of 81.65% can still be obtained after 50 cycles. The excellent performance and cycling stability are attributed to the unique 1D nanostructure, which facilitates the rapid electron exchange and fast lithium-ion diffusion between electrolyte and cathode materials.

Porous Li4Ti5O12–TiO2 nanosheet arrays for high-performance lithium-ion batteries

2015 ◽  
Vol 3 (18) ◽  
pp. 10107-10113 ◽  
Author(s):  
Lin Gao ◽  
Shaohui Li ◽  
Dekang Huang ◽  
Yan Shen ◽  
Mingkui Wang
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Cyclic Performance ◽  
Ion Diffusion ◽  
Nanosheet Arrays ◽  
Lithium Ion Diffusion

Interconnected mesoporous/macroporous structures can make the lithium ion diffusion faster in lithium ion batteries, resulting in promising cyclic performance.

N, O co-doped urchin-like carbon microspheres as high-performance anode materials for lithium ion batteries

2021 ◽  
Vol 361 ◽  
pp. 115562
Author(s):  
Chunli Zhou ◽  
Dengke Wang ◽  
Hui Yang ◽  
Ang Li ◽  
Huaihe Song ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Carbon Microspheres ◽  
Co Doped

Graphite@Silicon embedded in Carbon Conformally Coated Tiny SiO2 Nanoparticles Matrix for High-Performance Lithium-Ion Batteries

2021 ◽  
Author(s):  
Huitian Liu ◽  
Xu Liu ◽  
Zhaolin Liu ◽  
Junyan Tao ◽  
Xiaoqian Dai ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Large Volume ◽  
Volume Expansion ◽  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Sio2 Nanoparticles ◽  
Carbon Composites ◽  
Effective Strategy ◽  
Si Anode

Engineering of graphite@Si/carbon composites is considered as an effective strategy to surmount the shortcomings of low conductivity and large volume expansion of bare Si anode materials for lithium-ion batteries. Nevertheless,...

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