Extremely fast-charging lithium ion battery enabled by dual-gradient structure design

Lu, Lei‐Lei; Lu, Yuyang; Zhu, Zi‐Zhong; Shao, Jiaxin; Yao, Hong‐Bin; Wang, S.G.; Zhang, Tianwen; Ni, Yong; Wang, Xiuxia; Yu, Shu‐Hong

doi:10.1126/sciadv.abm6624

Cited by 101 publications

(45 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the pure Gr anode (Figure S4), the as-designed PG-Si/Gr can effectively boost the capacity of the anode, showing significant prospects for commercial applications. Such outstanding performances of the PG-Si/Gr anode can be ascribed to the unique sandwich-like structure, which, on one hand, can buffer the volume change of the Si-rich layer and subsequently improve the structural integrity of the electrode, and on the other hand, enhance the electrochemical reaction by the gradiently distributed active materials and porous structures within the electrode. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…Such outstanding performances of the PG-Si/Gr anode can be ascribed to the unique sandwich-like structure, which, on one hand, can buffer the volume change of the Si-rich layer and subsequently improve the structural integrity of the electrode, and on the other hand, enhance the electrochemical reaction by the gradiently distributed active materials and porous structures within the electrode. 50,51 To further study the reaction kinetics of the constructed electrodes, electrochemical impedance spectroscopy (EIS) measurements were carried out for the UD-Si/Gr, LG-Si/Gr, and PG-Si/Gr electrodes. As shown in Figure 5a, the Nyquist plots of the UD-Si/Gr, LG-Si/Gr, and PG-Si/Gr anodes after 100 cycles are composed of two compressed semicircles in the high-frequency region and an inclined line in the lowfrequency region, which correspond to the interface impedance (R sei ), the charge transfer resistance (R ct ), and the diffusion resistance of Li in the electrodes.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Functionally Gradient Silicon/Graphite Composite Electrodes Enabling Stable Cycling and High Capacity for Lithium-Ion Batteries

Zhang

Gui

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Silicon (Si) is regarded as one of the most promising anode materials for high-energy-density lithium (Li)-ion batteries (LIBs). However, Li insertion/extraction induced large volume change, which can lead to the fracture of the Si material itself and the delamination/pulverization of electrodes, is the major challenge for the practical application of Si-based anodes. Herein, a facile and scalable multilayer coating approach was proposed for the large-scale fabrication of functionally gradient Si/graphite (Si/Gr) composite electrodes to simultaneously mitigate the volume change-caused structural degradation and realize high capacity by regulating the spatial distributions of Si and Gr particles in the electrodes. Both our experimental characterizations and chemomechanical simulations indicated that, with a parabolic gradient (PG) distribution of Si through the thickness direction that the two Si-poor surface layers guarantee the major mechanical support and the middle Si-rich layer ensures the high capacity, the as-prepared PG-Si/Gr electrode can not only effectively improve the stability of the electrode structure but also efficiently enable high capacity and stable electrochemical reactions. Consequently, the PG-Si/Gr electrode with a mass loading of 3.15 mg cm–2 exhibited a reversible capacity of 579.2 mAh g–1 (1.82 mAh cm–2) after 200 cycles at 0.2C. Even with a mass loading of 8.45 mg cm–2, the PG-Si/Gr anodes still delivered a high reversible capacity of 4.04 mAh cm–2 after 100 cycles and maintained excellent cycling stability. Moreover, when paired with a commercial LiNi0.5Mn0.3Co0.2O2 (NCM532) cathode (9.56 mg cm–2), the PG-Si/Gr||NCM532 full cell revealed an initial reversible areal capacity of 1.64 mAh cm–2 and sustained a stable areal capacity of 0.94 mAh cm–2 at 0.2C after 100 cycles.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Functionally Gradient Silicon/Graphite Composite Electrodes Enabling Stable Cycling and High Capacity for Lithium-Ion Batteries

Zhang

Gui

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Designing porous structures helps to alleviate these issues but is likely at the expense of packing density and energy density. Interestingly, a rational electrode engineering of multiple gradients, namely, particle size gradient and porosity gradient in graphite anode, remarkably enhances the electrode stability and rate capability . This case indicates that multiple gradients can jointly address technical concerns and would have a profound impact on the practice of sodium batteries.…”

Section: Summary and Perspectivementioning

confidence: 95%

“…Interestingly, a rational electrode engineering of multiple gradients, namely, particle size gradient and porosity gradient in graphite anode, remarkably enhances the electrode stability and rate capability. 83 This case indicates that multiple gradients can jointly address technical concerns and would have a profound impact on the practice of sodium batteries. Undoubtedly, how to realize multiple gradients in various dimensions remains a grand challenge.…”

Section: Development Of Multiple Gradients In Electrodesmentioning

confidence: 99%

Gradient Designs for Efficient Sodium Batteries

Wang

2022

ACS Energy Lett.

View full text Add to dashboard Cite

Sodium batteries have received extensive attention as low-cost and high-performance devices for next-generation energy storage. There are, however, significant challenges toward practical deployment such as poor electrode integrity and durability. These are primarily caused by severe stress and strain upon electrochemical (de)sodiation, as a result of large Na ions. Gradient designs, either chemically or structurally, have proven uniquely capable of mitigating these issues. Despite the early stage of development, gradient designs have enabled significant progress in sodium batteries. In this Focus Review, we highlight the principles and features of gradient designs and their successful applications in sodium batteries. A particular focus is placed on the understanding of how the gradient idea could address some critical issues such as stress dissipation, structure stabilization, charge and mass transport, and dendrite suppression. The remaining challenges and future research directions related to gradients in sodium batteries are also discussed.

show abstract

“…The parameter j lim mainly depends on the value of β, which is increased in thicker electrodes with a smaller porosity and a higher tortuosity. , Therefore, architectural design in thick electrodes is pursued to remain a less tortuous structure and a shorter lithium-ion pathway . Recently, tremendous research efforts have been made in the structural design of thick electrodes, such as vertically arranged pores, , gradient pore structure, , and gradient active material, , with various advanced fabrication methods, such as ice templating, ,, phase inversion, ,,, and solvent evaporation . Although the above design strategies can promote the mass transport kinetics by creating pores and channels inside the thick electrodes, a high porosity is often employed.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Effects of Hierarchical Bimodal Microscale Porosity on Thick Electrodes

Zhang

et al. 2022

J. Phys. Chem. C

View full text Add to dashboard Cite

The thick electrode design is preferential in high-energy lithium-ion batteries (LIBs) systems. However, the sluggish ionic transport in homogeneous porous thick electrodes severely limits the areal capacity at high charging/discharging rates. The hierarchical porous design is a promising approach to mitigate kinetic limitations because it can distribute mass effectively in natural systems. In this study, the effects of bimodal microscale pores are fully investigated in thick electrodes from both architectural and electrochemical perspectives. Notably, by introduction of the bimodal microscale porous structure, the rate capability improves remarkably in thick electrodes with a low porosity (39%). By combining experimental results with simulations, this work presents a rational design guideline for preparing thick electrodes with a porosity at the commercial level, as well as simultaneous high energy and power densities, which brings new insights into the advanced electrode architecture design in scalable high-energy and high-power energy storage systems for practical applications.

show abstract

Extremely fast-charging lithium ion battery enabled by dual-gradient structure design

Cited by 101 publications

References 42 publications

Functionally Gradient Silicon/Graphite Composite Electrodes Enabling Stable Cycling and High Capacity for Lithium-Ion Batteries

Functionally Gradient Silicon/Graphite Composite Electrodes Enabling Stable Cycling and High Capacity for Lithium-Ion Batteries

Gradient Designs for Efficient Sodium Batteries

Unraveling the Effects of Hierarchical Bimodal Microscale Porosity on Thick Electrodes

Contact Info

Product

Resources

About