Synthesis of α-Fe2O3 double-layer hollow spheres with carbon coating using carbonaceous sphere templates for lithium ion battery anodes

Author(s):  
Shaowei Yao ◽  
Guifang Zhang ◽  
Xingxiang Zhang ◽  
Yabin Zhao ◽  
Zhiqiang Shi
RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70485-70492 ◽  
Author(s):  
Jun Jin ◽  
Xiao-Ning Ren ◽  
Yi Lu ◽  
Xian-Feng Zheng ◽  
Hong-En Wang ◽  
...  

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.


CrystEngComm ◽  
2014 ◽  
Vol 16 (9) ◽  
pp. 1802 ◽  
Author(s):  
Xinzhen Wang ◽  
Song Qiu ◽  
Guixia Lu ◽  
Cuizhu He ◽  
Jiurong Liu ◽  
...  

2012 ◽  
Vol 68 ◽  
pp. 28-31 ◽  
Author(s):  
Li Zhao ◽  
Fangqi Tao ◽  
Zhao Quan ◽  
Xianlong Zhou ◽  
Yuhong Yuan ◽  
...  

2016 ◽  
Vol 09 (02) ◽  
pp. 1650027 ◽  
Author(s):  
Yongli Cui ◽  
Jiali Wang ◽  
Mingzhen Wang ◽  
Quanchao Zhuang

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.


2019 ◽  
Vol 295 ◽  
pp. 246-252 ◽  
Author(s):  
Jianbiao Wang ◽  
Chengyu Yang ◽  
Jingjing Wang ◽  
Lijing Han ◽  
Mingdeng Wei

2021 ◽  
Vol 1 (3) ◽  
pp. 49-56
Author(s):  
S.M. Zuyev ◽  
◽  
R.A. Maleyev ◽  
YU.M. Shmatkov ◽  
M.YU. Khandzhalov ◽  
...  

This article provides a comparative analysis of various energy storage devices. A detailed review and analysis of molecular energy storage units is carried out, their main characteristics and parame-ters, as well as their application areas, are determined. The main types of molecular energy storage are determined: electric double layer capacitors, pseudo capacitors, hybrid capacitors. Comparison of the characteristics of various batteries is given. The parameters of various energy storage devices are presented. The analysis of molecular energy storage devices and accumulators is carried out. Ttheir advantages and disadvantages are revealed. It has been shown that molecular energy storage or double layer electrochemical capacitors are ideal energy storage systems due to their high specific energy, fast charging and long life compared to conventional capacitors. The article presents oscillograms of a lithium-ion battery with a voltage of 10.8 V at a pulsed load current of 2A of a laptop with and without a molecular energy storage device, as well as oscil-lograms of a laptop with DVD lithium-ion battery with a voltage of 10.8 V with a parallel shutdown of a molecular energy storage device with a capacity of 7 F and without it. The comparative analysis shows that when the molecular energy storage unit with a 7 F capacity is switched on and off, transient processes are significantly improved and there are no supply voltage dips. The dependenc-es of the operating time of a 3.6 V 600 mAh lithium-ion battery at a load of 2 A for powering mo-bile cellular devices with and without a molecular energy storage are given. It is shown that when the molecular energy storage device is switched on, the battery operation time increases by almost 20%.


Carbon ◽  
2011 ◽  
Vol 49 (4) ◽  
pp. 1508
Author(s):  
Yoshimi Ohzawa ◽  
Takumi Okabe ◽  
Takahiro Kasugai ◽  
Tsuyoshi Nakajima

2013 ◽  
Vol 25 (43) ◽  
pp. 6250-6255 ◽  
Author(s):  
Jae-Min Jeong ◽  
Bong Gill Choi ◽  
Soon Chang Lee ◽  
Kyoung G. Lee ◽  
Sung-Jin Chang ◽  
...  

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