Performance tuning of lithium ion battery cells with area-oversized graphite based negative electrodes

Dagger, Tim; Kasnatscheew, Johannes; Vortmann-Westhoven, Britta; Schwieters, Timo; Nowak, Sascha; Winter, Martin; Schappacher, Falko M.

doi:10.1016/j.jpowsour.2018.06.043

Cited by 35 publications

(27 citation statements)

References 42 publications

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“…In the final experiment, the Li metal negative electrode is simply exchanged by a graphite resulting in a LIB cell configuration 48,49 . The observed lower specific capacities during charge/discharge cycling (Fig.…”

Section: Spe Membrane Thicknessmentioning

confidence: 99%

Poly(Ethylene Oxide)-based Electrolyte for Solid-State-Lithium-Batteries with High Voltage Positive Electrodes: Evaluating the Role of Electrolyte Oxidation in Rapid Cell Failure

Homann

Stolz

Nair

et al. 2020

Sci Rep

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206

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polyethylene oxide (peo)-based solid polymer electrolytes (Spes) typically reveal a sudden failure in Li metal cells particularly with high energy density/voltage positive electrodes, e.g. Lini 0.6 Mn 0.2 co 0.2 o 2 (NMC622), which is visible in an arbitrary, time-and voltage independent, "voltage noise" during charge. A relation with SPE oxidation was evaluated, for validity reasons on different active materials in potentiodynamic and galvanostatic experiments. the results indicate an exponential current increase and a potential plateau at 4.6 V vs. Li|Li + , respectively, demonstrating that the main oxidation onset of the SPE is above the used working potential of NMC622 being < 4.3 V vs. Li|Li +. obviously, the Spe│NMC622 interface is unlikely to be the primary source of the observed sudden failure indicated by the "voltage noise". Instead, our experiments indicate that the Li | SPE interface, and in particular, Li dendrite formation and penetration through the Spe membrane is the main source. this could be simply proven by increasing the Spe membrane thickness or by exchanging the Li metal negative electrode by graphite, which both revealed "voltage noise"-free operation. The effect of membrane thickness is also valid with Lifepo 4 electrodes. in summary, it is the cell setup (peo thickness, negative electrode), which is crucial for the voltage-noise associated failure, and counterintuitively not a high potential of the positive electrode.

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Section: Spe Membrane Thicknessmentioning

confidence: 99%

Poly(Ethylene Oxide)-based Electrolyte for Solid-State-Lithium-Batteries with High Voltage Positive Electrodes: Evaluating the Role of Electrolyte Oxidation in Rapid Cell Failure

Homann

Stolz

Nair

et al. 2020

Sci Rep

Self Cite

206

200

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“…The capacity balancing of the negative electrode (NE) and positive electrode (PE) in LIBs has been considered to be a crucial point considering lifetime and safe operation for cell design. To minimize the risk of lithium plating at the surface of NE during charging, which is a severe aging and safety-deteriorating process, a geometrically oversized area (Dagger et al, 2018;Lewerenz et al, 2018), as well as a slight excess capacity (Xue et al, 1995;Appiah et al, 2016;Abe and Kumagai, 2018) of NE relative to PE are required for better safety. The N/P ratio is defined as the ratio of areal reversible capacity of NE and PE (Q NE /Q PE ).…”

Section: N/p Ratiomentioning

confidence: 99%

Safety Issues in Lithium Ion Batteries: Materials and Cell Design

et al. 2019

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As the most widely used energy storage device in consumer electronic and electric vehicle fields, lithium ion battery (LIB) is closely related to our daily lives, on which its safety is of paramount importance. LIB is a typical multidisciplinary product. A tiny single cell is composed of both organic and inorganic materials in multi scale. In addition, its relatively closure property made it difficult to be studied on line, let alone in the battery pack or system level. Safety, often manifested by stability on abuse, including mechanical, electrical, and thermal abuses, is a quite complicated issue of LIB. Safety has to be guaranteed in large scale application. Here, safety issues related to key materials and cell design techniques will be reviewed. Key materials, including cathode, anode, electrolyte, and separator, are the fundamental of the battery. Cell design and fabrication techniques also have significant influence on the cell's electrochemical and safety performances. Here, we will summarize the thermal runaway process in single cell level, and some recent advances on battery materials and cell design.

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“…of the material, which is bound to increase the diffusion resistance of lithium ion. As a result, the rate performance of layered graphite negative electrode is poor, which limits its application in high power battery (Kumagai et al, 2015;Libich et al, 2017;Dagger et al, 2018;Mazur et al, 2019). Therefore, improving the capacity and rate performance of carbon anode materials is an important issue to be solved urgently at present.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Hard Carbon as Anode of High Rate Capability for Lithium Ion Batteries

Rao

Lou

et al. 2020

Front. Energy Res.

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In order to develop new type of carbon anode material with high performance, a novel organic carbon material polyacrylonitrile (PAN) hard carbon was prepared by calcination of polypropylene cyanide at 1,050 • C. The obtained PAN hard carbon is used as the negative electrode material of lithium ion battery, showing an initial capacity of 343.5 mAh g −1 which is equal to that of graphite electrode (348.6 mAh g −1 ), and a higher initial coulomb efficiency of 87.9% than that of graphite electrode (84.4%). Moreover, the PAN hard carbon electrode shows superior cycle stability and rate performance at different current rates. The charge capacities are 320.1, 219.0, 212.9, and 123.5 mAh g −1 at current rates of 0.2, 1, 2, and 3 C, with coulombic efficiencies of 98.1, 100.6, 88.1, and 110.0%, respectively, which are higher than those of graphite electrode (83.8, 97.6, 98.8, and 94.1%). In addition, the charging capacity of PAN hard carbon electrode can still remain at 284.3 mAh g −1 (0.2 C after 200 cycles), 226.4 mAh g −1 (1 C after 300 cycles), 149.5 mAh g −1 (2 C after 400 cycles), and 120.0 mAh g −1 (3 C after 100 cycles), with capacity retention rates of 78.2, 111.9, 79.7, and 88.6%, respectively. The capacity and capacity retention rate after cycling are significantly higher than those of graphite electrode, indicating that the PAN hard carbon electrode shows superior rate performance, which would provide a new idea for the development of novel negative electrode material with high performance.

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Performance tuning of lithium ion battery cells with area-oversized graphite based negative electrodes

Cited by 35 publications

References 42 publications

Poly(Ethylene Oxide)-based Electrolyte for Solid-State-Lithium-Batteries with High Voltage Positive Electrodes: Evaluating the Role of Electrolyte Oxidation in Rapid Cell Failure

Poly(Ethylene Oxide)-based Electrolyte for Solid-State-Lithium-Batteries with High Voltage Positive Electrodes: Evaluating the Role of Electrolyte Oxidation in Rapid Cell Failure

Safety Issues in Lithium Ion Batteries: Materials and Cell Design

Polyacrylonitrile Hard Carbon as Anode of High Rate Capability for Lithium Ion Batteries

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