Computational screening of pristine and functionalized ordered TiVC MXenes as highly efficient anode materials for lithium-ion batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Ya-meng Li ◽  
Lei Li ◽  
Rao Huang ◽  
Yang Zhang ◽  
Yuhua Wen

With rapid development of rechargeable lithium-ion batteries, searching highly efficient electrode materials has become an ever-growing need for high power density and fast charge-discharge rate to meet the future challenges...

RSC Advances ◽  
2017 ◽  
Vol 7 (43) ◽  
pp. 27113-27120 ◽  
Author(s):  
Lei Tao ◽  
Yunwu Zheng ◽  
Yanhua Zhang ◽  
Huan Ma ◽  
Mingwei Di ◽  
...  

Mechanically flexible walnut shell-derived carbon nanofibers (CNFs) of 175 nm diameter were fabricated from a liquefied walnut shell—polyvinyl alcohol (PVA) hybrid solutionviaconventional electrospinning followed by one-step carbonization.


2016 ◽  
Vol 4 (29) ◽  
pp. 11481-11490 ◽  
Author(s):  
Lu Jin ◽  
Guobo Zeng ◽  
Hua Wu ◽  
Markus Niederberger ◽  
Massimo Morbidelli

A general methodology is proposed to produce active cathode/anode materials for lithium-ion batteries with a hierarchical structure.


Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1193 ◽  
Author(s):  
Shen ◽  
Zhong ◽  
Huang ◽  
Lin ◽  
Wang

Well-designed nanostructures are very important for the electrochemical performance of lithium-ion electrode materials. In order to improve the electrochemical performance of ZnO-based anode materials, ZnO/Ni composite film, assembled by ordered hollow microsphere arrays, is designed and fabricated by means of magnetron sputtering technique using a colloidal crystal template composed of a monolayer of ordered polystyrene (PS) microspheres. The ordered hollow microsphere structure as well as the constituent Ni component of the ZnO/Ni film show major advantages of homogenizing electrode reactions, enhancing electrode reaction kinetics and accommodating volume change of active materials, so they can reduce electrode polarization and stabilize electrode structure. Consequently, the resulting ordered ZnO/Ni hollow microspheres arrays deliver an initial charge capacity of 685 mAh g−1, an initial coulombic efficiency of 68%, and a capacity retention rate of 69% after 100 cycles, all of which are higher than those of the pure ZnO film. These results show progress in developing more stable ZnO-based anode materials for lithium ion batteries.


2019 ◽  
Vol 11 (8) ◽  
pp. 2363 ◽  
Author(s):  
Guangwen Zhang ◽  
Zhongxing Du ◽  
Yaqun He ◽  
Haifeng Wang ◽  
Weining Xie ◽  
...  

The recovery of cathode and anode materials plays an important role in the recycling process of spent lithium-ion batteries (LIBs). Organic binders reduce the liberation efficiency and flotation efficiency of electrode materials derived from spent LIBs. In this study, pyrolysis technology is used to improve the recovery of cathode and anode materials from spent LIBs by removing organic binders. Pyrolysis characteristics of organics in electrode materials are investigated, and on this basis, the effects of pyrolysis parameters on the liberation efficiency of electrode materials are studied. Afterwards, flotation technology is used to separate cathode material from anode material. The results indicate that the optimum liberation efficiency of electrode materials is obtained at a pyrolysis temperature of 500 °C, a pyrolysis time of 15 min and a pyrolysis heating rate of 10 °C/min. At this time, the liberation efficiency of cathode materials is 98.23% and the liberation efficiency of anode materials is 98.89%. Phase characteristics of electrode materials cannot be changed under these pyrolysis conditions. Ultrasonic cleaning was used to remove pyrolytic residues to further improve the flotation efficiency of electrode materials. The cathode material grade was up to 93.89% with a recovery of 96.88% in the flotation process.


RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1200-1221
Author(s):  
Minkang Wang ◽  
Tianrui Chen ◽  
Tianhao Liao ◽  
Xinglong Zhang ◽  
Bin Zhu ◽  
...  

The development of new electrode materials for lithium-ion batteries (LIBs) has attracted significant attention because commercial anode materials in LIBs, like graphite, may not be able to meet the increasing energy demand of new electronic devices.


RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10688-10698
Author(s):  
Xin Xue ◽  
Junming Luo ◽  
Lingqian Kong ◽  
Jinsheng Zhao ◽  
Yan Zhang ◽  
...  

Four different kinds of conjugated porous polymers PTTs were synthesized and their composites with carbon material were used as the electrode materials for LIBs.


2017 ◽  
Vol 5 (34) ◽  
pp. 18088-18094 ◽  
Author(s):  
Amélie Robitaille ◽  
Alexis Perea ◽  
Daniel Bélanger ◽  
Mario Leclerc

Organic polymers are currently investigated as active electrode materials. Here, new TPD-based polymers were prepared and studied as anode materials for lithium-ion battery.


Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3120
Author(s):  
Kefyalew Wagari Guji ◽  
Wen-Chen Chien ◽  
Fu-Ming Wang ◽  
Alagar Ramar ◽  
Endazenaw Bizuneh Chemere ◽  
...  

In this study we prepared potassium-ion batteries (KIBs) displaying high output voltage and, in turn, a high energy density, as replacements for lithium-ion batteries (LIBs). Organic electrode materials featuring void spaces and flexible structures can facilitate the mobility of K+ to enhance the performance of KIBs. We synthesized potassium maleamate (K-MA) from maleamic acid (MA) and applied as an anode material for KIBs and LIBs, with 1 M potassium bis(fluorosulfonyl)imide (KFSI) and 1 M lithium bis(fluorosulfonyl)imide (LiFSI) in a mixture of ethylene carbonate and ethyl methyl carbonate (1:2, v/v) as respective electrolytes. The K-MA_KFSI anode underwent charging/discharging with carbonyl groups at low voltage, due to the K···O bond interaction weaker than Li···O. The K-MA_KFSI and K-MA_LiFSI anode materials delivered a capacity of 172 and 485 mA h g−1 after 200 cycles at 0.1C rate, respectively. K-MA was capable of accepting one K+ in KIB, whereas it could accept two Li+ in a LIB. The superior recoveries performance of K-MA_LiFSI, K-MA_KFSI, and Super P_KFSI at rate of 0.1C were 320, 201, and 105 mA h g−1, respectively. This implies the larger size of K+ can reversibly cycling at high rate.


RSC Advances ◽  
2017 ◽  
Vol 7 (39) ◽  
pp. 24418-24424 ◽  
Author(s):  
Jian Yang ◽  
Mengqiang Wu ◽  
Feng Gong ◽  
Tingting Feng ◽  
Cheng Chen ◽  
...  

Mixed metal vanadate oxides are promising superior anode materials for lithium ion batteries due to their high specific capacities, improved cycling performance and excellent rate properties.


Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1064 ◽  
Author(s):  
Elisa Thauer ◽  
Alexander Ottmann ◽  
Philip Schneider ◽  
Lucas Möller ◽  
Lukas Deeg ◽  
...  

Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices. (2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.


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