Energy Storage Science and Technology
Xulai YANG1(), Zheng ZHANG2, Yong CAO2, Chengshi LIU2, Xinping AI3
Received:
2020-04-19
Revised:
2020-05-12
CLC Number:
Xulai YANG, Zheng ZHANG, Yong CAO, Chengshi LIU, Xinping AI. The structural engineering for achieving high energy density Li-ion batteries[J]. Energy Storage Science and Technology, doi: 10.19799/j.cnki.2095-4239.2020.0147.
Table 2
Typical design parameters of a prismatic-2714891 LiFePO4/Graphite cell"
固定参数 | 设计值 | 可变参数 | 设计值 |
---|---|---|---|
磷酸铁锂可发挥容量(mAh/g) | 143 | 正极压实密度(mg/mm3) | 2.15 |
石墨负极可发挥容量(mAh/g) | 350 | 负极压实密度(mg/mm3) | 1.45 |
隔膜密度(mg/mm3) | 0.91 | 正极活性物质占比(%) | 91.0 |
铝箔密度(mg/mm3) | 2.7 | 负极活性物质占比(%) | 94.0 |
铜箔密度(mg/mm3) | 8.9 | 铝箔厚度(mm) | 0.015 |
电解液密度(mg/mm3) | 1.3 | 铜箔厚度(mm) | 0.009 |
单片正极尺寸(mm) | 141×78 | 隔膜厚度(mm) | 0.020 |
单片负极尺寸(mm) | 143×80 | 面积 N/P比 | 1.2 |
单片隔膜尺寸(mm) | 145×82 | 正极面密度(mg/mm2) | 0.14 |
电解液注液量(g/Ah) | 4.8 | ||
电池尺寸(mm) | 26.5×148×91 |
Table 4
The effect of design parameters on battery energy density"
工艺参数 | 设计值 | 调整值 | 质量能量密度增加百分比 | 体积能量密度增加百分比 |
---|---|---|---|---|
各参数同时调整后 | 31.8% | 38.5% | ||
正极压实密度(mg/mm3) | 2.15 | 2.4 | 0.6% | 5.1% |
负极压实密度(mg/mm3) | 1.45 | 1.7 | 0.6% | 5.1% |
电解液注液量(g/Ah) | 4.8 | 4.0 | 3.4% | 0.0% |
正极活性物质占比(%) | 91.0 | 96.0 | 3.2% | 4.1% |
负极活性物质占比(%) | 94.0 | 97.0 | 0.6% | 1.2% |
正极面密度(mg/mm2) | 0.14 | 0.21 | 3.2% | 4.1% |
面积 N/P比 | 1.2 | 1.1 | 1.7% | 2.4% |
铝箔厚度(mm) | 0.015 | 0.012 | 1.1% | 1.3% |
铜箔厚度(mm) | 0.009 | 0.006 | 3.7% | 1.3% |
隔膜厚度(mm) | 0.020 | 0.017 | 1.0% | 2.5% |
电池尺寸(mm) | 26.5×148×91 | 79×148×91 | 4.9% | 3.2% |
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