Anode materials for lithium-ion batteries: A review

Nzereogu, P.U.; Omah, A. D.; Ezema, Fabian I.; Iwuoha, Emmanuel I.; Nwanya, Assumpta C.

doi:10.1016/j.apsadv.2022.100233

Cited by 329 publications

(132 citation statements)

References 134 publications

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“…This phenomenon is commonly observed in the conversion-based anode materials, because during the discharge-charge process of the initial cycles, the SEI layer is not fully formed. This accounts for the low CE and capacity loss during initial cycles, as reported in previous studies [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The CV result described earlier also accords with this behavior.…”

Section: Resultssupporting

confidence: 87%

“…However, the major drawback of these alloy-type anode materials is their massive volume expansion during cycling: for instance, Si expands up to 320%, leading to the failure of the active material. Extensive studies are ongoing to fix their volume expansion and stabilize them for LIBs [20][21][22]. Anode materials of the insertion type, such as carbonaceous materials and titanium-based oxides, have limited specific capacity.…”

Section: Introductionmentioning

confidence: 99%

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MoO3@MoS2 Core-Shell Structured Hybrid Anode Materials for Lithium-Ion Batteries

et al. 2022

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We explore a phase engineering strategy to improve the electrochemical performance of transition metal sulfides (TMSs) in anode materials for lithium-ion batteries (LIBs). A one-pot hydrothermal approach has been employed to synthesize MoS2 nanostructures. MoS2 and MoO3 phases can be readily controlled by straightforward calcination in the (200–300) °C temperature range. An optimized temperature of 250 °C yields a phase-engineered MoO3@MoS2 hybrid, while 200 and 300 °C produce single MoS2 and MoO3 phases. When tested in LIBs anode, the optimized MoO3@MoS2 hybrid outperforms the pristine MoS2 and MoO3 counterparts. With above 99% Coulombic efficiency (CE), the hybrid anode retains its capacity of 564 mAh g−1 after 100 cycles, and maintains a capacity of 278 mAh g−1 at 700 mA g−1 current density. These favorable characteristics are attributed to the formation of MoO3 passivation surface layer on MoS2 and reactive interfaces between the two phases, which facilitate the Li-ion insertion/extraction, successively improving MoO3@MoS2 anode performance.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

MoO3@MoS2 Core-Shell Structured Hybrid Anode Materials for Lithium-Ion Batteries

et al. 2022

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“…For example, silicon anode as well as other anode materials experience very large volume changes during the lithiation/de-lithiation process, giving rise to an unstable SEI layer, loss of electrical contact between the active material and the current collector, an eventual pulverization of the material and huge capacity loss. In addition, some of these materials experience poor conductivity giving rise to low capacity [223]. From the implementation of novel synthesis techniques to the application of advanced microscopy techniques for morphological and mechanistic confirmation, more and more nanotechnology terminologies such as core-shell, surface coatings, nanostructures, nanosized and nanoscale effect, begin to appear in cutting edge battery research literature [224].…”

Section: Discussionmentioning

confidence: 99%

Elucidating the charge-transfer and Li-ion-migration mechanisms in commercial lithium-ion batteries with advanced electron microscopy

Liu

Jiang

et al. 2022

Nano Research Energy

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“…We used a set of coupled initial and boundary value equations to describe the fracture processes due to diffusion-induced stresses in the active particles of the electrodes. Although our present work focused on the material level (that is, on active particles), the model can be readily extended to describe the behavior at the component level (i.e., the electrodes) and other materials such as silicon [ 41 , 42 , 43 ]. Our physical models, described below, were numerically solved using a lattice model formulation, that is, using one-dimensional elements within a finite element method framework.…”

Section: Methodsmentioning

confidence: 99%

Numerical Analysis of Degradation and Capacity Loss in Graphite Active Particles of Li-Ion Battery Anodes

2022

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It is well known that the performance and durability of lithium-ion batteries (LIBs) can be severely impaired by fracture events that originate in stresses due to Li ion diffusion in fast charge–discharge cycles. Existing models of battery damage overlook either the role of particle shape in stress concentration, the effect of material disorder and preexisting defects in crack initiation and propagation, or both. In this work we present a novel, three-dimensional, and coupled diffusive-mechanical numerical model that simultaneously accounts for all these phenomena by means of (i) a random particle generator and (ii) a stochastic description of material properties implemented within the lattice method framework. Our model displays the same complex fracture patterns that are found experimentally, including crack nucleation, growth, and branching. Interestingly, we show that irregularly shaped active particles can suffer mechanical damage up to 60% higher than that of otherwise equivalent spherical particles, while material defects can lead to damage increments of up to 110%. An evaluation of fracture effects in local Li-ion diffusivity shows that effective diffusion can be reduced up to 25% at the particle core due to lithiation, while it remains at ca. 5% below the undamaged value at the particle surface during delithiation. Using a simple estimate of capacity loss, we also show that the C-rate has a nonlinear effect on battery degradation, and the estimated capacity loss can surpass 10% at a 2C charging rate.

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Anode materials for lithium-ion batteries: A review

Cited by 329 publications

References 134 publications

MoO3@MoS2 Core-Shell Structured Hybrid Anode Materials for Lithium-Ion Batteries

MoO3@MoS2 Core-Shell Structured Hybrid Anode Materials for Lithium-Ion Batteries

Elucidating the charge-transfer and Li-ion-migration mechanisms in commercial lithium-ion batteries with advanced electron microscopy

Numerical Analysis of Degradation and Capacity Loss in Graphite Active Particles of Li-Ion Battery Anodes

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