The electrochemical behavior of silicon and graphite anode materials with different cathodes for lithium ion cells

2020 ◽  
Vol 272 ◽  
pp. 127889
Author(s):  
Neslihan Yuca
Keyword(s):  
Electrochemical Behavior ◽  
Anode Materials ◽  
Lithium Ion ◽  
Graphite Anode ◽  
Lithium Ion Cells

scholarly journals A cooperative biphasic MoOx–MoPx promoter enables a fast-charging lithium-ion battery

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sang-Min Lee ◽  
Junyoung Kim ◽  
Janghyuk Moon ◽  
Kyu-Nam Jung ◽  
Jong Hwa Kim ◽  
...  
Keyword(s):  
Anode Materials ◽  
Surface Engineering ◽  
Dominant Role ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Graphite Anode ◽  
Graphite Surface ◽  
High Rate ◽  
Fast Charging ◽  
Li Ion

AbstractThe realisation of fast-charging lithium-ion batteries with long cycle lifetimes is hindered by the uncontrollable plating of metallic Li on the graphite anode during high-rate charging. Here we report that surface engineering of graphite with a cooperative biphasic MoOx–MoPx promoter improves the charging rate and suppresses Li plating without compromising energy density. We design and synthesise MoOx–MoPx/graphite via controllable and scalable surface engineering, i.e., the deposition of a MoOx nanolayer on the graphite surface, followed by vapour-induced partial phase transformation of MoOx to MoPx. A variety of analytical studies combined with thermodynamic calculations demonstrate that MoOx effectively mitigates the formation of resistive films on the graphite surface, while MoPx hosts Li+ at relatively high potentials via a fast intercalation reaction and plays a dominant role in lowering the Li+ adsorption energy. The MoOx–MoPx/graphite anode exhibits a fast-charging capability (<10 min charging for 80% of the capacity) and stable cycling performance without any signs of Li plating over 300 cycles when coupled with a LiNi0.6Co0.2Mn0.2O2 cathode. Thus, the developed approach paves the way to the design of advanced anode materials for fast-charging Li-ion batteries.

CoPx synthesis and lithiation by ball-milling for anode materials of lithium ion cells

2005 ◽  
Vol 176 (7-8) ◽  
pp. 693-697 ◽  
Author(s):  
Zongshuang Zhang ◽  
Jun Yang ◽  
Yanna Nuli ◽  
Baofeng Wang ◽  
Jinqiang Xu
Keyword(s):  
Ball Milling ◽  
Anode Materials ◽  
Lithium Ion ◽  
Lithium Ion Cells

Tin and tin-based intermetallics as new anode materials for lithium-ion cells

2001 ◽  
Vol 94 (2) ◽  
pp. 189-193 ◽  
Author(s):  
Mario Wachtler ◽  
Jürgen O. Besenhard ◽  
Martin Winter
Keyword(s):  
Anode Materials ◽  
Lithium Ion ◽  
Lithium Ion Cells

Improved Carbon Anode Materials for Lithium-Ion Cells

1997 ◽  
Vol 496 ◽  
Author(s):  
J. Flynn ◽  
C. Marsh
Keyword(s):  
Anode Materials ◽  
Reference Electrode ◽  
Lithium Ion ◽  
Discharge Voltage ◽  
Carbon Anode ◽  
Test Results ◽  
Half Cell ◽  
Cell Discharge ◽  
Lithium Ion Cells ◽  
Cell Data

ABSTRACTSeveral carbon materials have been studied for suitability as anode materials in lithium-ion cells. Carbons that have been included in this evaluation are three grades of commercially available mesophase carbon microbeads (MCMB) 6–28, 10–28 and 25–28, two specially prepared mesophase fibers (Amoco), a foreign mesophase fiber and KS-15 graphite (Lonza). Differences in cycling behavior between the three types of MCMB material are shown. Data of full lithium-ion cells demonstrate the effect that the choice of carbon material has on the cell discharge voltage and capacity. Lithium reference electrode experiments in full cells (3.0–4.0Ah capacity), elucidate the dynamics under several charge/discharge regimes and provide a comparison between the performance of carbon fiber and graphite anode materials. These test results indicate that the fibers can be charged at significantly higher rates than graphite without showing polarization at the anode. Full and half cell data also demonstrates the high coulombic efficiencies of the mesophase materials and first cycle efficiencies as compared to graphite. A comparison of two mesophase materials with different textures in full cells under strenuous cycling conditions shows significant differences in capacity retention. SEM photos of fibers showing the different textures are also presented.

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