An Empirical Model for the Design of Batteries with High Energy Density

Wu, Yingqiang; Xie, Leqiong; Ming, Hai; Guo, Yingjun; Hwang, Jang Yeon; Wang, Wenxi; He, Xiangming; Wang, Limin; Alshareef, Husam N.; Sun, Yang Kook; Ming, Jun

doi:10.1021/acsenergylett.0c00211

Cited by 115 publications

(67 citation statements)

References 62 publications

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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%

Metal Catalyst to Construct Carbon Nanotubes Networks on Metal Oxide Microparticles towards Designing High‐Performance Electrode for High‐Voltage Lithium‐Ion Batteries

Sun

Cao

Zhang

et al. 2021

Adv Funct Materials

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Designing carbon nanotubes (CNTs)-based materials are attracting great attention due to their fantastic properties and greater performance. Herein, a new CNTs network triggered by metal catalysts (e.g., Co, Ni, or Cu) is constructed on metal oxide (e.g., MnO) microparticles, giving rise to a high-performance Co-MnO@C-CNTs anode in lithium-ion batteries (LIBs). An extremely high capacity of 1050 mAh g −1 , extraordinary rate capacities over 10 A g −1 , and a long lifespan over 500 cycles are demonstrated. The great features of Co-MnO@C-CNTs anode are further confirmed in LIBs when the nickel-rich cathode (e.g., LiNi 0.8 Co 0.1 Mn 0.1 O 2 ) is used and charged at a high voltage over 4.5 V. A high-capacity retention of 71.5% can be maintained at 1 C over 150 cycles. The superior performance relates to the CNTs network, which not only acts as an "expressway network" for fast ion/electron transportation but also buffers structural variation. Moreover, the metal nanoparticles can also enhance the electrical conductivity and catalyze the (de-)lithiation of metal oxide, resulting in higher reversibility and long-term cyclability. This study opens a new avenue to prepare CNTs-based functional materials and also explores the potential applications of metal oxide-based anode for high-performance batteries.

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Section: Resultsmentioning

confidence: 99%

Metal Catalyst to Construct Carbon Nanotubes Networks on Metal Oxide Microparticles towards Designing High‐Performance Electrode for High‐Voltage Lithium‐Ion Batteries

Sun

Cao

Zhang

et al. 2021

Adv Funct Materials

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“…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).…”

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confidence: 99%

Graphene collage on Ni-rich layered oxide cathodes for advanced lithium-ion batteries

et al. 2021

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The energy storage performance of lithium-ion batteries (LIBs) depends on the electrode capacity and electrode/cell design parameters, which have previously been addressed separately, leading to a failure in practical implementation. Here, we show how conformal graphene (Gr) coating on Ni-rich oxides enables the fabrication of highly packed cathodes containing a high content of active material (~99 wt%) without conventional conducting agents. With 99 wt% LiNi0.8Co0.15Al0.05O2 (NCA) and electrode density of ~4.3 g cm-3, the Gr-coated NCA cathode delivers a high areal capacity, ~5.4 mAh cm−2 (~38% increase) and high volumetric capacity, ~863 mAh cm-3 (~34% increase) at a current rate of 0.2 C (~1.1 mA cm-2); this surpasses the bare electrode approaching a commercial level of electrode setting (96 wt% NCA; ~3.3 g cm-3). Our findings offer a combinatorial avenue for materials engineering and electrode design toward advanced LIB cathodes.

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“…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%

A Lightweight, Adhesive, Dual‐Functionalized Over‐Coating Interphase Toward Ultra‐Stable High‐Current Density Lithium Metal Anodes

Wei

2020

Energy & Environ Materials

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Coherent manipulation of the lithium plating pattern is at the heart of the safe operation of metallic anodes in the battery technologies. In this article, a lightweight (~0.3 mg cm−2), dual‐functionalized carbon spheres are anchored onto the Cu foil as the interfacial protective layer via the chelation process of the catechol groups in the polydopamine precursor and the copper foil. The dual‐functionalized carbon spheres exhibit the intriguing complementary features: Lithiophilic nitrogen dopants favor the Li+ ion absorption and mitigate the nucleation barrier, while the micro/mesopore reservoir spatially homogenizes the ion flux distribution, confining the metallic propagation without dendrite‐like protrusions. The metallic anode exhibits an ultra‐stable plating/stripping process for 1400 hr with the average Coulombic efficiency of ~99%. A full‐cell prototype is constructed by pairing the N‐doped carbon spheres on the bare Cu (NCS‐Cu) electrode with the high‐mass‐loading LiVPO4F (12.5 mg cm−2) cathode that can deliver a high energy density of 421.2 Wh kg−1 with the highest power density of 2106 W kg−1 to promise the anode use for high‐power/energy‐dense metallic batteries.

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An Empirical Model for the Design of Batteries with High Energy Density

Cited by 115 publications

References 62 publications

Metal Catalyst to Construct Carbon Nanotubes Networks on Metal Oxide Microparticles towards Designing High‐Performance Electrode for High‐Voltage Lithium‐Ion Batteries

Metal Catalyst to Construct Carbon Nanotubes Networks on Metal Oxide Microparticles towards Designing High‐Performance Electrode for High‐Voltage Lithium‐Ion Batteries

Graphene collage on Ni-rich layered oxide cathodes for advanced lithium-ion batteries

A Lightweight, Adhesive, Dual‐Functionalized Over‐Coating Interphase Toward Ultra‐Stable High‐Current Density Lithium Metal Anodes

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