ACS Applied Energy Materials · 2020 · 112 citations · 43 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryEnergy MaterialsMaterials ChemistryBattery MaterialsCathode MaterialsDopingElectrochemical Energy StorageElectrode MaterialsEnergy Storage MaterialsBattery Interface StabilityInterphase EngineeringLithium-ion BatteriesLithium-ion Battery Cathode MaterialsLithium-ion Battery Electrodes Based On Metal OxidesLithium-ion Battery MaterialsNickel-rich CathodesStructural Stability
The nickel-rich transition metal oxide—NMC, LiNi1–x–yMxCoyO2, 1 – x – y ≥ 0.6—shows great potential for use in lithium-ion batteries that exhibit high energy densities; however, large-scale use of the material in batteries is hindered by technical challenges, including secondary particle cracking, interfacial instability, and cell degassing during cycling. In this paper, we report a strategy that employs minimal Al doping to improve the bulk integrity, structure, and interfacial stability of the cathode and, hence, the long-term cycling capability. With only 1 mol % Al doping, the Al-NMC76 electrode can retain 79.2% capacity after 500 cycles at 4.5 V, which is far better than the capacity retention for undoped NMC76 tested under similar conditions. The improved cycling can be attributed to the Al doping in the NMC76, which not only improves bulk structural stability by introducing the Al doping into the lattice but also suppresses chemical reactions with the acidic electrolyte.
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Michel Armand, J.-M. Tarascon · Nature · 2008 · 19.3K citations
Florian Schipper, Hana Bouzaglo, Mudit Dixit et al. · Advanced Energy Materials · 2017 · 558 citations
Natural Sciences, Materials Engineering, Materials Science +17