Lithium Metal Battery Pouch Cell Assembly and Prototype Demonstration Using Tailored Polypropylene Separator
Lithium Metal Battery Pouch Cell Assembly and Prototype Demonstration Using Tailored Polypropylene Separator
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DOI：
10.1002/ente.202000094
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发表时间：
2020-03
影响因子：
3.8
通讯作者：
M. Palanisamy;Vihang P. Parikh;M. Parekh;V. Pol
中科院分区：
文献类型：
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作者：
M. Palanisamy;Vihang P. Parikh;M. Parekh;V. Pol
开发现实的锂金属电池（LMB）是非常可取的，以解决高功率应用的能量存储需求的稳定增长。因此，聚多巴胺定制的聚丙烯隔板能够在聚丙烯隔板上涂覆108 μm厚的石墨烯纳米片。层状LiNi 1/3 Mn 1/3Co 1/3 O2（LNMC）阴极通过X射线衍射分析（XRD）和扫描电子显微镜（SEM）分析来表征，其表现出具有六方结构、Rm空间群的单相纯度和具有包含初级颗粒的次级颗粒的均匀球形形态。基于所提出的设计策略制造锂金属电池袋式电池（LMBPC），其含有锂金属阳极、LNMC阴极和定制的聚丙烯隔板而没有任何内部短路，其中聚多巴胺和石墨烯纳米片层以袋式电池堆叠顺序朝向LNMC阴极定位。组装的软包电池在3.0和4.2 V之间循环，并提供1000 mAh的电池容量。然后将充电的LMBPC连接到原型电子卡车上，并在25 °C和< −5 °C的各种表面上进行演示。从原型卡车演示结果来看，LMBPC可用于实际的高功率应用，包括电动汽车、混合动力汽车和电网储能。
The development of realistic lithium metal batteries (LMBs) is highly desirable to address the steady increase in the energy‐storage demand for high‐power applications. Consequently, the polydopamine‐tailored polypropylene separator enables scale up with ≈8 μm‐thick graphene nanosheets coating on the polypropylene separator. A layered LiNi1/3Mn1/3Co1/3O2(LNMC) cathode is characterized by X‐ray diffraction analysis (XRD) and scanning electron microscopy (SEM) analysis, which exhibits single phase purity with a hexagonal structure,Rmspace group, and a homogenized spherical shape morphology with secondary particles comprising primary particles. Lithium metal battery pouch cells (LMBPCs) are fabricated based on the proposed design strategies, containing a lithium metal anode, LNMC cathode, and tailored polypropylene separator without any internal short circuit, wherein polydopamine and graphene nanosheets layers are positioned toward the LNMC cathode in the pouch cell stacking order. The assembled pouch cell is cycled between 3.0 and 4.2 V and delivers a cell capacity of ≈500 mAh. Then the charged LMBPCs are connected to the prototype electronic truck and demonstrated on various surfaces at 25 °C and < −5 °C. From the prototype truck demonstration results, LMBPCs are useful for practical high‐power applications, including electric vehicles, hybrid electric vehicles, and grid energy storage.