Cobalt dissolution in LiCoO2-based non-aqueous rechargeable batteries

Amatucci, Glenn G.; Tarascon, J. M.; Klein, Lisa C.

doi:10.1016/0167-2738(95)00231-6

Cited by 547 publications

(396 citation statements)

References 6 publications

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“…6b. By contrast, the practically realizable capacities and energy densities for LiMnO 2 , LiFePO 4 and LiCoO 2 cathodes lie [12][13][14] in the 110-170 mAh g À 1 and 470-545 Wh kg À 1 range, respectively. A comparison of the specific capacities versus cycle index obtained from the lithiated PGN cathode and conventional cathode materials [47][48][49][50] has been provided in Fig.…”

Section: Articlementioning

confidence: 99%

“…In 1980, Goodenough and co-workers 11 first demonstrated the use of LiCoO 2 as cathodes with a theoretical capacity of B273 mAh g À 1 and a theoretical energy density of 1.11 kWh kg À 1 . However, the practical capacity 12 of LiCoO 2 is only B140 mAh g À 1 (with energy densities of B500 Wh kg À 1 ) due to the restricted cycling voltage window of 4.2 V. Cycling above 4.2 V results in the dissolution of cobalt in the electrolyte, thereby leading to a rapid decay in capacity. In order to overcome these drawbacks, various approaches have been adopted such as incorporation of coatings and partial substitution of cobalt with nickel, which helps suppress lattice expansion and hence allows for extended cycling 13,14 .…”

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confidence: 99%

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Defect-induced plating of lithium metal within porous graphene networks

et al. 2014

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Lithium metal is known to possess a very high theoretical capacity of 3,842 mAh g À 1 in lithium batteries. However, the use of metallic lithium leads to extensive dendritic growth that poses serious safety hazards. Hence, lithium metal has long been replaced by layered lithium metal oxide and phospho-olivine cathodes that offer safer performance over extended cycling, although significantly compromising on the achievable capacities. Here we report the defect-induced plating of metallic lithium within the interior of a porous graphene network. The network acts as a caged entrapment for lithium metal that prevents dendritic growth, facilitating extended cycling of the electrode. The plating of lithium metal within the interior of the porous graphene structure results in very high specific capacities in excess of 850 mAh g À 1 . Extended testing for over 1,000 charge/discharge cycles indicates excellent reversibility and coulombic efficiencies above 99%.

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Section: Articlementioning

confidence: 99%

mentioning

confidence: 99%

Defect-induced plating of lithium metal within porous graphene networks

et al. 2014

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“…Commercial lithium ion batteries are cobalt-based and limited to applications in small portable electronic devices due to the practical capacity limitation [1][2][3], cost and safety issues [4,5]. Future energy storage devices need advanced materials to fulfill the higher demands in terms of energy density and safety, while reducing the cost and environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical performance of <30 nm thin LiMnPO4 nanorods with a reduced amount of carbon as a cathode for lithium ion batteries

Kwon

Fromm

2012

Electrochimica Acta

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5-10 nm thin rod shaped LiMnPO 4 nanoparticles are synthesized by an improved thermal decomposition method. The synthesis parameters such as the concentration of surfactants, reaction temperature and time, as well as the presence of a solvent play a critical role in the formation of spherical, thin or thick nanorods, and needle-shaped particles of LiMnPO 4 . A washing procedure to efficiently eliminate the surfactants attached to the surface of LiMnPO 4 nanoparticles is presented, avoiding thermal treatment at high temperatures. A nanocomposite LiMnPO 4 electrode provides a discharge capacity of 165 mAh/g at 1/40 C and 66 mAh/g at 1 C with only 10 wt% of total carbon additive. The characteristics of as-synthesized and low amount of carbon coated LiMnPO 4 are described as well as their electrochemical properties.

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“…For example, solid electrolyte interphase (SEI) layer on the electrode could reduce accessible surface area for lithium ions even if the specific surface area was very similar with the initial status [33]. There could also be another possible reason for the capacity fade [34]. As shown in [20], the capacity of a LIB was dominated by the cathode material rather than the anode material.…”

Section: Resultsmentioning

confidence: 95%

Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries

et al. 2014

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Abstract:The realistic three dimensional (3D) microstructure of lithium ion battery (LIB) electrode plays a key role in studying the effects of inhomogeneous microstructures on the performance of LIBs. However, the complexity of realistic microstructures imposes a significant computational cost on numerical simulation of large size samples. In this work, we used tomographic data obtained for a commercial LIB graphite electrode to evaluate the geometric characteristics of the reconstructed electrode microstructure. Based on the analysis of geometric properties, such as porosity, specific surface area, tortuosity, and pore size distribution, a representative volume element (RVE) that retains the geometric characteristics of the electrode material was obtained for further numerical studies. In this work, X-ray micro-computed tomography (CT) with 0.56 μm resolution was employed to capture the inhomogeneous porous microstructures of LIB anode electrodes. The Sigmoid transform function was employed to convert the initial raw tomographic images to binary images. Moreover, geometric characteristics of an anode electrode after 2400 cycles at the charge/discharge rate of 1 C were compared with those of a new anode electrode to investigate morphological change of the electrode. In general, the cycled electrode shows larger porosity, smaller tortuosity, and similar specific surface area compared to the new electrode. OPEN ACCESSEnergies 2014, 7 2559

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Cobalt dissolution in LiCoO2-based non-aqueous rechargeable batteries

Cited by 547 publications

References 6 publications

Defect-induced plating of lithium metal within porous graphene networks

Defect-induced plating of lithium metal within porous graphene networks

Enhanced electrochemical performance of <30 nm thin LiMnPO4 nanorods with a reduced amount of carbon as a cathode for lithium ion batteries

Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries

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