Abundant grain boundaries activate highly efficient lithium ion transportation in high rate Li4Ti5O12 compact microspheres

2019 ◽  
Vol 7 (3) ◽  
pp. 1168-1176 ◽  
Author(s):  
Jiaming Ma ◽  
Yinping Wei ◽  
Lin Gan ◽  
Chao Wang ◽  
Heyi Xia ◽  
...  
Keyword(s):  
Energy Density ◽  
Grain Boundaries ◽  
Lithium Ion ◽  
High Rate ◽  
Highly Efficient ◽  
Tap Density ◽  
Ion Transportation ◽  
Huge Challenge

It is a huge challenge for high-tap-density electrodes to achieve high volumetric energy density but without compromising the ionic transportation.

Hierarchical Li-rich oxide microspheres assembled from {010} exposed primary grains for high-rate lithium-ion batteries

2020 ◽  
Vol 44 (20) ◽  
pp. 8486-8493 ◽  
Author(s):  
Zhongyue Zi ◽  
Yantao Zhang ◽  
Yangqian Meng ◽  
Ge Gao ◽  
Peiyu Hou
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Lithium Ion Batteries ◽  
Size Distribution ◽  
Lithium Ion ◽  
High Rate ◽  
Tap Density ◽  
Wide Particle Size Distribution

The wide particle size distribution of LLO microspheres assembled from {010} exposed primary grains is proposed to improve their Li+ kinetics and tap-density.

scholarly journals New dry carbon nanotube coating of over-lithiated layered oxide cathode for lithium ion batteries

2014 ◽  
Vol 2 (46) ◽  
pp. 19670-19677 ◽  
Author(s):  
Junyoung Mun ◽  
Jin-Hwan Park ◽  
Wonchang Choi ◽  
Anass Benayad ◽  
Jun-Ho Park ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Multiwall Carbon Nanotube ◽  
High Rate Capability ◽  
Oxide Cathode ◽  
Multiwall Carbon

For high rate capability and energy density of lithium ion batteries, over-lithiated layered cathodes coated by multiwall carbon nanotube were prepared by a novel dry method without decay in the structure.

Na-doped Ni-rich LiNi0.5Co0.2Mn0.3O2cathode material with both high rate capability and high tap density for lithium ion batteries

2014 ◽  
Vol 43 (39) ◽  
pp. 14824-14832 ◽  
Author(s):  
Weibo Hua ◽  
Jibin Zhang ◽  
Zhuo Zheng ◽  
Wenyuan Liu ◽  
Xihao Peng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
High Rate Capability ◽  
Tap Density

Carbon-based materials for lithium-ion capacitors

2019 ◽  
Vol 3 (7) ◽  
pp. 1265-1279 ◽  
Author(s):  
Xiaojun Wang ◽  
Lili Liu ◽  
Zhiqiang Niu
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Large Power ◽  
Excellent Stability ◽  
Carbon Based

Lithium-ion capacitors (LICs) can deliver high energy density, large power density and excellent stability since they possess a high-capacity battery-type electrode and a high rate capacitor-type electrode.

On-chip high power porous silicon lithium ion batteries with stable capacity over 10 000 cycles

Nanoscale ◽  
2015 ◽  
Vol 7 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Andrew S. Westover ◽  
Daniel Freudiger ◽  
Zarif S. Gani ◽  
Keith Share ◽  
Landon Oakes ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Power Density ◽  
High Power ◽  
Lithium Battery ◽  
Lithium Ion ◽  
High Rate ◽  
On Chip ◽  
Battery Anode

We demonstrate the operation of a graphene-passivated on-chip porous silicon material as a high rate lithium battery anode with over 50X power density, and 100X energy density improvement compared to identically prepared on-chip supercapacitors.

scholarly journals A Bifunctional-Modulated Conformal Li/Mn-Rich Layered Cathode for Fast-Charging, High Volumetric Density and Durable Li-Ion Full Cells

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Zedong Zhao ◽  
Minqiang Sun ◽  
Tianqi Wu ◽  
Jiajia Zhang ◽  
Peng Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Hollow Microsphere ◽  
Lithium Ion ◽  
High Energy ◽  
Structure Design ◽  
High Energy Density ◽  
Great Promise ◽  
Energy Devices ◽  
Tap Density

AbstractLithium- and manganese-rich (LMR) layered cathode materials hold the great promise in designing the next-generation high energy density lithium ion batteries. However, due to the severe surface phase transformation and structure collapse, stabilizing LMR to suppress capacity fade has been a critical challenge. Here, a bifunctional strategy that integrates the advantages of surface modification and structural design is proposed to address the above issues. A model compound Li1.2Mn0.54Ni0.13Co0.13O2 (MNC) with semi-hollow microsphere structure is synthesized, of which the surface is modified by surface-treated layer and graphene/carbon nanotube dual layers. The unique structure design enabled high tap density (2.1 g cm−3) and bidirectional ion diffusion pathways. The dual surface coatings covalent bonded with MNC via C-O-M linkage greatly improves charge transfer efficiency and mitigates electrode degradation. Owing to the synergistic effect, the obtained MNC cathode is highly conformal with durable structure integrity, exhibiting high volumetric energy density (2234 Wh L−1) and predominant capacitive behavior. The assembled full cell, with nanographite as the anode, reveals an energy density of 526.5 Wh kg−1, good rate performance (70.3% retention at 20 C) and long cycle life (1000 cycles). The strategy presented in this work may shed light on designing other high-performance energy devices.

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