CIBF2016-Yi-Shiun Chen
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CSCC 中 鋼 碳 素 15
Characteristics of MG11 series
• High capacity (350mAh/g) compared with other small particle MCMB or AG.
• Outstanding charge/ discharge rate for kinds of high power /rate cells. • Excellent LT performance for special requests. • Good for PHEV, high power, high rate batteries.
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CSCC 中 鋼 碳 素
12
Successful cases of MG11 series
Life performance
MG11-A: 98.0% @ C720
Competitor: 92.2% @ C750
PHEV NMC 20Ah pouch cell
E-scooter LFP 10Ah pouch cell
Cu foil
Low (002/110) ratio
CSCC 中 鋼 碳 素 20
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Electrode swelling
Electrode Density = 1.7 g/cm3
charge
discharge
• Less structure deformation, longer cycle life. • The particle size of meso-Graphite would not change hugely during the long-term cycle.
4
Production capacity will be expanded to 7500 T/yr in 2018 Q1.
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CSCC 中 鋼 碳 素
Outline
• Company profiles • Anode for LIBs
– Requirements for LIBs – Features of Mesophase Graphite – Development for higher capacity
• Tasks for lower cost
• Summary
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What are we looking for?
Safety
Life
Energy
Cost
N.G. Meso-Graphite
Power
Size reduce
Many tradeoffs
D50 Material (um) MG11 MG12 MG13 11.3 17.8 21.4 1st 1st Cycle Discharge Effic. in 2 3 (m /g) (g/cm ) (mAh/g) 25%PC(%) 1.5 2.25 350.8 84.2 1 2.25 356.5 87.8 1.1 2.26 361.9 72 BET True D.
Particle size is still the key factor of capacity.
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CSCC 中 鋼 碳 素 9
The major task of Higher Capacity
• Higher graphitization degree:
1) More electricity (≣heat) is necessary. 2) Optimization of graphitization process.
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CSCC 中 鋼 碳 素
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Capacity Improvement on General Particle Size Anode, MG12 for high energy density requirements
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Developing motive of MG12
HQ of Ce project initiated
◆ 1997 ISO 14000 certified ◆ 2002 ISO 9001:2000 & OHSAS 18001 certified ◆ 2002 Meso-phase graphite MP
340
5% Up!
8% Up!
330
SMGP
MGP 330-335mAh/g
FMGP 320-325mAh/g
10
15 20 25
320
D50 Particle Size (μm)
11
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CSCC 中 鋼 碳 素
Capacity Improvement on Small Particle Size Anode, MG11 for high power/ high rate applications
◆ 2013 ISO/TS 16949 certified
◆ 2014 Changzhou CSCC founded
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CSCC 中 鋼 碳 素 3
Production capacity & Facilities
Capacity (T/yr)
8000 6000 4000 2000 0
CSCC 中 鋼 碳 素
10
CSCC Product Upgrade
360
High specific capacity!
MG13,
~360 mAh/g
Specific Capacity (mAh/g)
MG12
350
MG11 ~355 mAh/g
~350 mAh/g
CS350
~350 mAh/g
DG A
• Rate /Power of mesophase graphite (MCMB) is excellent and much better than other AG & NG.
CSCC 中 鋼 碳 素 14
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Successful cases of MG11 series
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Besides the basic requests
• More & more requests such as: i) Fast charge
ii) Wide operation Temperature
iii) Less swelling (pouch)
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CSCC 中 鋼 碳 素 8
The major task of Higher Capacity
• More studies about precursor & process:
1) Better control of raw material. 2) Less variation during manufacturing process.
• Tasks for lower cost
• Summary
CSCC 中 鋼 碳 素 2
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China Steel Chemical Corp.
CSCC Milestone
◆ Total capital 80 M USD ◆ CSC takes 29% shares ◆ 1989 Established
LT performance
Cold cranking test, pass criteria, >2.0 V.
Applied in ultra low temperature, -40℃, used 18650 2.6Ah LCO cell.
• Mesophase graphite (MCMB) can meet both high & low temperature requirements.
• Very good results from customers.
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CSCC 中 鋼 碳 素 13
Successful cases of MG11 series
Rate / Power performance
High rate NMC cell
20Ah Pouch LFP cell
80
7500
200 400 5000 800 2600 1400
2002 2003 2004 2005 2010 2011 2013 2017 2018
year
Based on GP precursor. Key supplier of mesophase products.
Fully automatic line. Stable & consistent quality.
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CSCC 中 鋼 碳 素
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Electrode wetting
Electrode Density = 1.7 g/cm3
Coated NG
Cu foil
Cu foil
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