2020
DOI: 10.1021/acsenergylett.0c00211
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An Empirical Model for the Design of Batteries with High Energy Density

Abstract: The development of rechargeable batteries beyond 300 Wh kg -1 for electric vehicles remains challenging, where low capacity electrode materials (especially graphite anode, 372 Ah kg -1 ) remain as the major bottleneck. Although many high capacity alternatives (e.g., Sibased alloys, metal oxides, or Li-based anode) are being widely explored, the energy density achieved has not exceeded 300 Wh kg -1 . Herein, we present a new empirical model that considers multiple design parameters, besides electrode capacities… Show more

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Cited by 113 publications
(67 citation statements)
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“…The lithium‐ion battery was particularly charged to the high voltage of 4.5 V for the higher energy density. [ 44 ] In addition to the high rate features, the battery with the higher energy/power density can be designed, which is because the high capacity of Co‐MnO@C‐CNTs around 1050 mAh g −1 can reduce 3 times mass amount of anode in battery compared to that of graphite (i.e., ≈340 mAh g −1 ) for the same energy capacity. The capacity ratio of anode/cathode (i.e., N/P) of the designed battery is controlled at around 1.2.…”
Section: Resultsmentioning
confidence: 99%
“…The lithium‐ion battery was particularly charged to the high voltage of 4.5 V for the higher energy density. [ 44 ] In addition to the high rate features, the battery with the higher energy/power density can be designed, which is because the high capacity of Co‐MnO@C‐CNTs around 1050 mAh g −1 can reduce 3 times mass amount of anode in battery compared to that of graphite (i.e., ≈340 mAh g −1 ) for the same energy capacity. The capacity ratio of anode/cathode (i.e., N/P) of the designed battery is controlled at around 1.2.…”
Section: Resultsmentioning
confidence: 99%
“…22, both the bare and Gr-coated NCA particles have a NiO-like structure in the vicinity of the surface of the primary particles after cycling 35,36 . However, the Gr-coated particles showed lesser intraparticle cracking than the bare particles, which can be attributed to the protection by Gr from electrolyte penetration into the secondary particle interior to some extent during repeated cycles 6,11,12,37 .…”
Section: Resultsmentioning
confidence: 94%
“…The consumer markets still push toward improved energy and power density at affordable costs 4,5 . The energy storage capability of LIB cells depends on the electrode/cell design and electrode materials 5,6 . Typically, an increase in the cell energy results from an increased areal capacity (Q areal ) by increasing the electrode thickness (areal mass loading, m areal of active materials).…”
mentioning
confidence: 99%
“…In the practical battery applications (formats such as a pouch, cylindrical, and prismatic cell), the empirical k value falls within the range of 0.45–0.6 to estimate the energy density of the cell unit, as elaborated in . [ 40 ] These results indicate the unique structure and the feasibility of the NCS over‐coating interphase toward high‐current density metallic anode use.…”
Section: Resultsmentioning
confidence: 96%