Fraction of the theoretical specific energy achieved on pack level for hypothetical battery chemistries
Fraction of the theoretical specific energy achieved on pack level for hypothetical battery chemistries
复制标题
假设的电池化学成分在电池组水平上实现的理论比能量的分数
DOI：
10.1016/j.jpowsour.2014.05.071
复制
发表时间：
2014
影响因子：
9.2
通讯作者：
K. Gallagher
中科院分区：
文献类型：
--
作者：
D. Eroglu;S. Ha;K. Gallagher
在评估先进电池的新活性材料化学时，通常使用理论比能来激励研究和开发。然后使用包装因数将理论比能与包装级比能联系起来。由于该因子通常被假定为恒定的，因此更高的理论比能量被认为会导致更高的组件能级比能量。为了验证这一隐含的假设，我们使用同行评议的自下而上的电池设计模型，计算了不同开路电压和理论比能量的假设电池化学物质在电池组水平上获得的理论比能量的比例。由于所需非活性物质的数量的变化，组件级别的比能量明显依赖于开路电压和电化学阻抗。在低值平均开路电压下，具有显著不同理论比能量的系统可能会导致电池组在质量和体积上相似。对于理论比能较低的体系，在电池组水平上获得的理论比能所占的比例较高，这主要是因为活性物质质量占电池组质量的主导。最后，低值的面积比阻抗对于具有高理论比能和低开路电压的化学物质获得更高的组装级比能是至关重要的。
In valuing new active materials chemistries for advanced batteries, the theoretical specific energy is commonly used to motivate research and development. A packaging factor is then used to relate the theoretical specific energy to the pack-level specific energy. As this factor is typically assumed constant, higher theoretical specific energies are judged to result in higher pack-level specific energies. To test this implicit assumption, we calculated the fraction of the theoretical specific energy achieved on the pack level for hypothetical cell chemistries with various open-circuit voltages and theoretical specific energies using a peer-review bottom-up battery design model. The pack-level specific energy shows significant dependence on the open-circuit voltage and electrochemical impedance due to changes in the quantity of inactive materials required. At low-valued average open-circuit voltages, systems with dramatically different theoretical specific energies may result in battery packs similar in mass and volume. The fraction of the theoretical specific energy achieved on the pack level is higher for the lower theoretical specific energy systems mainly because the active materials mass dominates the pack mass. Finally, low-valued area-specific impedance is shown to be critical for chemistries of high theoretical specific energy and low open-circuit voltage to achieve higher pack-level specific energies.
影响因子：
5
作者：
Bruce, Peter G.;Hardwick, Laurence J.;Abraham, K. M.
通讯作者：
Abraham, K. M.