Free-standing ultrathin lithium metal–graphene oxide host foils with controllable thickness for lithium batteries

Chen, Hao; Yang, Yufei; Boyle, David T.; Jeong, You Kyeong; Xu, Rong; Vasconcelos, Luize Scalco de; Huang, Zhuojun; Wang, Hansen; Wang, Hongxia; Huang, Wenxiao; Li, Huiqiao; Wang, Jiangyan; Gu, Hanke; Matsumoto, Ryuhei; Motohashi, K.; Nakayama, Yasuo; Zhao, Kejie; Cui, Yi

doi:10.1038/s41560-021-00833-6

Cited by 229 publications

(114 citation statements)

References 37 publications

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“…These tailored structures with molecule-level integrations make the active materials fully display their potential with more improved performance as a consequence, but the clear elucidation of the influence of interface heterostructures is absent. The graphene-based materials also show their advantages in constructing freestanding and flexible electrodes, , such as using rGO film as host to fabricate ultrathin and robust free-standing Li composite film . Overall, graphene and the composites as electrodes can enable large-capacity, high-rate, and long-term cycling stability performance at the same time in the three systems.…”

Section: Discussionmentioning

confidence: 99%

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Chen

Gao

2021

ACS Materials Lett.

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Lithium-ion technology has led a revolution of portable electronics and is being widely used for large-scale applications such as electric vehicles. However, the main problem associated with the shortage of lithium resource poses a challenge for the traditional lithium-ion prototype and calls for exploration of alternative batteries. The bottleneck of the lithium-ion battery, as such, has prompted the study of sodium-, potassium-, and aluminum-ion batteries, which have the distinct advantage of abundant resources. Graphene materials as electrodes, on the one hand, can actively take part in the electrochemical reactions. On the other hand, they can act as conductive additives to improve kinetics and as buffers to support the structural integrity of the electrodes. In this Review, we discuss the effects of graphene on electrochemical performance of the electrodes in the three battery systems, with emphasis on the general structural design principles and underlying mechanisms which enable the performance improvement. We elucidate the benefits of the graphene materials and highlight the examples of tailored nanostructures that create high-energy-density, fast-charging, and long-lasting performance. We end with an outlook of existing challenges and future opportunities.

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Section: Discussionmentioning

confidence: 99%

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Chen

Gao

2021

ACS Materials Lett.

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“…Advanced rechargeable batteries are currently being developed to power a variety of appliances, ranging from portable devices like smartphones to large-scale equipment including electric vehicles and grid energy-storage systems [1][2][3][4][5]. A large number of studies have focused on the development of high-capacity composite electrodes to enhance the energy density and performance of the next-generation rechargeable batteries [6,7]. In particular, silicon (Si) is theoretically expected to provide about ten times higher capacity (ca.…”

Section: Introductionmentioning

confidence: 99%

Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode

et al. 2021

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Cycling stability is a key challenge for application of silicon (Si)-based composite anodes as the severe volume fluctuation of Si readily leads to fast capacity fading. The binder is a crucial component of the composite electrodes. Although only occupying a small amount of the total composite mass, the binder has major impact on the long-term electrochemical performance of Si-based anodes. In recent years, water-based binders including styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) have attracted wide research interest as eco-friendly and low-cost alternatives for the conventional poly(vinylidene difluoride) (PVDF) binder in Si anodes. In this study, Si-based composite anodes are fabricated by simple solid mixing of the active materials with subsequent addition of SBR and CMC binders. This approach bypasses the use of toxic and expansive organic solvents. The factors of binder, silicon, and graphite materials have been systematically investigated. It is found that the retained capacities of the anodes are more than 440 mAh/g after 400 cycles. These results indicate that organic solvent free process is a facile strategy for producing high performance silicon/graphite composite anodes.

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“…A few strategies have been proposed to inhibit the Li/Na dendrites, such as anchoring lithiophilic/sodiophilic sites on the current collector, − regulating the Li/Na-ion distribution, − and modifying the solid–electrolyte interface (SEI) layer. − Although the performance of Li/Na anodes is improved by the above strategies, these improvements are usually reflected by the thick Li/Na foils in most previous studies, and the achieved effect is not satisfied with the thin Li/Na anodes. Thick Li/Na anodes mean a low utilization of Li/Na metal and a low depth of discharge (DOD), which significantly reduces the energy densities of lithium/sodium metal batteries (LMBs/SMBs) . It also severely weakened the competitiveness of commercial lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Lithium/Sodium Metal Batteries with High Utilization Enabled by a Holey Two-Dimensional N-Doped TiNb₂O₇ Host

Huang

Zhu

et al. 2021

Nano Lett.

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Lithium/sodium metal batteries have attracted enormous attention as promising candidates for high-energy storage devices. However, their practical applications are impeded by the growth of dendrites upon Li/Na plating. Here, we report that holey 2D N-doped TiNb2O7 (N-TNO) nanosheets with high electroactive surface area and large amounts of lithiophilic/sodiophilic sites can effectively regulate Li/Na deposition as an interfacial layer, leading to an excellent cycling stability. The N-TNO interfacial layer enables the Li||Li symmetric cell to sustain stable electrodeposition over 1000 h as well as the Na||Na cell to stably cycle for 2400 h at 1 mA cm–2 and 3 mA h cm–2 with a depth of discharge as high as 50%. The full cells of the Li/Na anodes based on the N-TNO layer paired with the LiFePO4 and NaTi2(PO4)3 cathodes, respectively, show a very stable cycling over 1000 cycles at a negative-to-positive electrode capacity (N/P) ratio up to 3.

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Free-standing ultrathin lithium metal–graphene oxide host foils with controllable thickness for lithium batteries

Cited by 229 publications

References 37 publications

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode

Highly Stable Lithium/Sodium Metal Batteries with High Utilization Enabled by a Holey Two-Dimensional N-Doped TiNb₂O₇ Host

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Free-standing ultrathin lithium metal–graphene oxide host foils with controllable thickness for lithium batteries

Cited by 229 publications

References 37 publications

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Advanced Graphene Materials for Sodium/Potassium/Aluminum-Ion Batteries

Organic Solvent Free Process to Fabricate High Performance Silicon/Graphite Composite Anode

Highly Stable Lithium/Sodium Metal Batteries with High Utilization Enabled by a Holey Two-Dimensional N-Doped TiNb2O7 Host

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Product

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Highly Stable Lithium/Sodium Metal Batteries with High Utilization Enabled by a Holey Two-Dimensional N-Doped TiNb₂O₇ Host