2D Porous Nb4N5@Nb2C Heterojunctions for High-Performance Li-ion Batteries

2D Materials ◽  
2021 ◽  
Author(s):  
Jingsong Wu ◽  
Yunfeng Guan ◽  
Ke Li ◽  
Qun Xie ◽  
Zhiming Wang ◽  
...  
Keyword(s):  
Volume Expansion ◽  
Active Sites ◽  
High Performance ◽  
High Rate ◽  
Electrochemical Performances ◽  
Transition Metal Nitrides ◽  
Diffusion Paths ◽  
Li Ion ◽  
High Rate Performance ◽  
Self Aggregation

Abstract Constructing transition metal nitrides (TMNs) with a 2D porous structure is an effective strategy to alleviate their volume expansion and self-aggregation issues, eventually enhancing their electrochemical performance. However, very few studies have been reported up to now. Herein, 2D porous Nb4N5@Nb2C heterojunctions are successfully synthesized from Nb2C MXene precursor by employing a two-step nitridation method in NH3 atmosphere. Owing to the abundant active sites, fast Li-ions diffusion paths, and sufficient buffer space for releasing volume expansion, 2D porous Nb4N5@Nb2C heterojunctions achieve high rate performance and excellent cycling stablility, maintaining 109.2 mAh g-1 at 2 A g-1 after 800 cycles. This work provides a facile strategy for building 2D porous TMNs and their heterojunctions with excellent electrochemical performances.

Hierarchical architecture of hybrid carbon-encapsulated hollow manganese oxide nanotubes with a porous-wall structure for high-performance electrochemical energy storage

2016 ◽  
Vol 4 (6) ◽  
pp. 2049-2054 ◽  
Author(s):  
Geon-Hyoung An ◽  
Jung Inn Sohn ◽  
Hyo-Jin Ahn
Keyword(s):  
High Performance ◽  
Porous Wall ◽  
High Rate ◽  
Electrochemical Energy Storage ◽  
Hierarchical Architecture ◽  
Wall Structure ◽  
Rate Performance ◽  
Li Ion ◽  
High Rate Performance ◽  
Hybrid Carbon

Uniquely designed hierarchical architecture of hybrid carbon-encapsulated porous hollow nanotubes with favorable routes and sites for Li ion insertion/extraction, resulting in improved high-rate performance and cycling stability.

scholarly journals Three-dimensional clusters of peony-shaped CuO nanosheets as a high-rate anode for Li-ion batteries

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10760-10766
Author(s):  
Lin Hu ◽  
Zhong Yang ◽  
Hulin Li ◽  
Xiao Yang ◽  
Jianping Li ◽  
...  
Keyword(s):  
Volume Expansion ◽  
Three Dimensional ◽  
Ion Conductivity ◽  
High Rate ◽  
Electrochemical Performances ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Cuo Nanosheets

TCP-CuO possesses a unique three-dimensional peony-liked architecture which not only alleviates volume expansion problem, but also enhances electron/ion conductivity. As an anode in LIBs, TCP-CuO delivers excellent electrochemical performances.

scholarly journals High Capacity and Fast Kinetics of Potassium-Ion Batteries Boosted by Nitrogen-Doped Mesoporous Carbon Spheres

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jiefeng Zheng ◽  
Yuanji Wu ◽  
Yong Tong ◽  
Xi Liu ◽  
Yingjuan Sun ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Potassium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
Economic Price

AbstractIn view of rich potassium resources and their working potential, potassium-ion batteries (PIBs) are deemed as next generation rechargeable batteries. Owing to carbon materials with the preponderance of durability and economic price, they are widely employed in PIBs anode materials. Currently, porosity design and heteroatom doping as efficacious improvement strategies have been applied to the structural design of carbon materials to improve their electrochemical performances. Herein, nitrogen-doped mesoporous carbon spheres (MCS) are synthesized by a facile hard template method. The MCS demonstrate larger interlayer spacing in a short range, high specific surface area, abundant mesoporous structures and active sites, enhancing K-ion migration and diffusion. Furthermore, we screen out the pyrolysis temperature of 900 °C and the pore diameter of 7 nm as optimized conditions for MCS to improve performances. In detail, the optimized MCS-7-900 electrode achieves high rate capacity (107.9 mAh g−1 at 5000 mA g−1) and stably brings about 3600 cycles at 1000 mA g−1. According to electrochemical kinetic analysis, the capacitive-controlled effects play dominant roles in total storage mechanism. Additionally, the full-cell equipped MCS-7-900 as anode is successfully constructed to evaluate the practicality of MCS.

scholarly journals Enhancing Li-ion capacity and rate capability in cation-defective vanadium ferrite aerogels via aluminum substitution

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14495-14503
Author(s):  
Christopher N. Chervin ◽  
Ryan H. DeBlock ◽  
Joseph F. Parker ◽  
Bethany M. Hudak ◽  
Nathaniel L. Skeele ◽  
...  
Keyword(s):  
Rate Capability ◽  
High Rate ◽  
Rate Performance ◽  
Li Ion ◽  
High Rate Performance ◽  
Aluminum Substitution

Substituting electroinactive Al3+ into vanadium ferrite aerogels boosts capacity to battery-relevant levels but in a material that expresses pseudocapacitive character and high-rate performance.

In-Plane Assembled Orthorhombic Nb2 O5 Nanorod Films with High-Rate Li+ Intercalation for High-Performance Flexible Li-Ion Capacitors

2017 ◽  
Vol 28 (1) ◽  
pp. 1704330 ◽  
Author(s):  
Bohua Deng ◽  
Tianyu Lei ◽  
Weihua Zhu ◽  
Liang Xiao ◽  
Jinping Liu
Keyword(s):  
High Performance ◽  
High Rate ◽  
Li Ion

Solution-Combustion Synthesized Nanocrystalline Li4Ti5O12As High-Rate Performance Li-Ion Battery Anode

2010 ◽  
Vol 22 (9) ◽  
pp. 2857-2863 ◽  
Author(s):  
A. S. Prakash ◽  
P. Manikandan ◽  
K. Ramesha ◽  
M. Sathiya ◽  
J-M. Tarascon ◽  
...  
Keyword(s):  
High Rate ◽  
Rate Performance ◽  
Li Ion Battery ◽  
Solution Combustion ◽  
Li Ion ◽  
High Rate Performance ◽  
Battery Anode

High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries

2014 ◽  
Vol 105 (14) ◽  
pp. 143904 ◽  
Author(s):  
Takashi Teranishi ◽  
Yumi Yoshikawa ◽  
Ryo Sakuma ◽  
Hideki Hashimoto ◽  
Hidetaka Hayashi ◽  
...  
Keyword(s):  
High Rate ◽  
Rate Performance ◽  
Li Ion Batteries ◽  
Li Ion ◽  
High Rate Performance

Tailoring natural layered β-phase antimony into few layer antimonene for Li storage with high rate capabilities

2019 ◽  
Vol 7 (7) ◽  
pp. 3238-3243 ◽  
Author(s):  
Yujie Gao ◽  
Weifeng Tian ◽  
Chengxue Huo ◽  
Kan Zhang ◽  
Shiying Guo ◽  
...  
Keyword(s):  
Volume Expansion ◽  
Anode Materials ◽  
Cycling Performance ◽  
High Rate ◽  
Efficient Strategy ◽  
Alloy Anode ◽  
Β Phase ◽  
Ion Storage ◽  
Li Ion ◽  
Li Storage

Downsizing alloy anode materials has been demonstrated as an efficient strategy to alleviate volume expansion and prolong the cycling performance for lithium (Li) ion storage.

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