A design-based predictive model for lithium-ion capacitors

Moye, Davis George; Moss, Pedro L.; Chen, X.J.; Cao, Weicheng; Foo, Simon Y.

doi:10.1016/j.jpowsour.2019.226694

Cited by 16 publications

(3 citation statements)

References 27 publications

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“…Trend lines were extrapolated from the foiled data, as shown in Figure 2. The trendlines revealed the following Arrhenius relationships, which meet the form of Equation 15, where capacitance (c) is expressed as a percentage (15) and (17) are met.…”

Section: Resultsmentioning

confidence: 83%

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Observations on Arrhenius Degradation of Lithium-Ion Capacitors

Moye¹,

Moss²,

Chen³

et al. 2020

MSA

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Earlier research determined that lithium-ion capacitor (LIC) cycle life degradation can be accelerated by elevated temperature. LIC cycle life degradation can be described by an Arrhenius equation. This study performed cycle life testing at a constant temperature but varied cycle current. The results were described by an Arrhenius equation relying upon the number of cycles and a constant, which was determined by cycle current. Using mathematical derivations and experimental results, the researchers quantified the effects of activation energy and temperature upon this constant. Because cell temperature is nearly constant during cycles, it was deduced that elevated cycle current decreases activation energy. This lower activation energy then accelerates degradation. Thus this research demonstrates that cycle current ages LICs through its effects on their activation energies.

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Section: Resultsmentioning

confidence: 83%

“…Because in an LIC the amount of charge stored at the negative electrode is orders of magnitude higher than the cathode [1], assume [17]…”

Section: Earlier Researchmentioning

confidence: 99%

Observations on Arrhenius Degradation of Lithium-Ion Capacitors

Moye¹,

Moss²,

Chen³

et al. 2020

MSA

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“…Nevertheless, depending on the selected materials, EIS spectra, as well as cell performance, can vary substantially. [40,41] Often, LIC charge-discharge profiles ranging from discharge times of thousands of seconds to hundreds of seconds are summarized in a single graph, what makes it difficult to extract information about the symmetricity and the ESR from the profiles recorded at the fastest discharge times. In addition, considering that LICs are power focused devices, their limits should be challenged, and so, be charge-discharged even in few seconds.…”

Section: Esr Capacity Capacitance Rate Capability and Eementioning

confidence: 99%

Unraveling the Technology behind the Frontrunner LIC ULTIMO to Serve as a Guideline for Optimum Lithium‐Ion Capacitor Design, Assembly, and Characterization

Caizán‐Juanarena

Arnaiz

Gucciardi

et al. 2021

Advanced Energy Materials

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development of high energy electrochemical capacitors-also known by the product names of supercapacitors (SCs) and ultracapacitors (UCs)-in the mid 90's, set the technology in the EES scenario in early 2000s, with a boom of companies that started to place different products in the market. [1][2][3][4][5][6][7] However, the non-compliance of market expectations by the end of 2010 together with the consequences of a global financial crisis led to a turbulent period with a redeployment of the main characters. [8] Fortunately, it seems that the UC business is now solid, with great market expectations in key economic sectors such as transportation, renewables, or electronics (see Figure 1a). Parallel to industry, academic research in the field experienced a rapid growth as indicated by the steady increase in the number of annual publications (see Figure 1b). In the first period of the century, the growth was contended, and there were several reports devoted to the metrics and the proper characterization of materials and devices given the evolution of the learning curve. [9][10][11][12] 2010 became a turning point, when the chaos generated in literature by the many novel materials and architectures rising without a universally accepted definition, tremendously difficult to track technology progress. That same year, Conte proposed the actual naming criterion in order to organize the field. [13] Soon after, the community experienced an over-rapid growth which required several tutorials in order to "refresh" best practices for measuring and reporting metrics such as capacitance, capacity, coulombic and energy efficiencies, electrochemical impedance, and energy and power densities of faradaic, capacitive and pseudocapacitive materials for SCs. Prof. Simon and Prof. Gogotsi started a cycle of guidance articles in 2011 who themselves closed in 2019, [14,15] with many more parallel guidelines been published during those years, [16][17][18] and still seem not to be enough further in 2020. [19] Research in UCs has been driven by the dire need of increasing energy density, the final judge, even for most highpower applications. In 2001, a novel technology emerged to complete the current EES systems trio. Lithium-ion capacitors (LICs) were born in order to fill the energy gap between lithium-ion batteries (LIBs) and UCs [20,21] (Figure 1c). LICs are combining both LIB and UC characteristics and are risingThe fast growth experienced by the field of lithium-ion capacitors (LICs) in the last five years led to tremendous progress in this technology. However, the authors have observed some parallelism with its ultracapacitor (UC) sister technology, where an over-rapid growth in the last decade resulted in a loss of focus and the need of several tutorials for reconducting incorrect reporting habits. In the light of what may be coming, the authors aim to set this work as a direction to the scientific community and the new researchers in the field to serve as i) a retrospective analysis of the original target for LICs to prevent focus dev...

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