Quantitative Analyses of the Interfacial Properties of Current Collectors at the Mesoscopic Level in Lithium Ion Batteries by Using Hierarchical Graphene

Wang, Mingzhan; Yang, Hao; Wang, Kexin; Chen, Shulin; Ci, Haina; Shi, Lei; Shan, Jingyuan; Xu, Shipu; Wu, Qinci; Wang, Chongzhen; Tang, Miao; Gao, Peng; Liu, Zhongfan; Peng, Hailin

doi:10.1021/acs.nanolett.0c00348

Cited by 19 publications

(12 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Notably, the signal of COAl bonding detected for Al@G substantiates that graphene is chemically bound to native Al oxide, confirming the strong adhesion and good electrical contact between the in situ‐grown graphene overlayer and the Al foil. [ 22 ] Mechanical peeling‐off tests [ 23 ] (Figure S9, Supporting Information) demonstrated that the average adhesion strength of the modified layer on the Al foil was ≈1.72 and 10.52 N m −1 for Al@C and Al@G, respectively (Figure 1i). After the tests, most of the graphene layer in Al@G was retained, whereas the carbon coating in Al@C was almost completely peeled off (Figure 1i, inset).…”

Section: Resultsmentioning

confidence: 99%

An Anode‐Free Potassium‐Metal Battery Enabled by a Directly Grown Graphene‐Modulated Aluminum Current Collector

Zhao

Liu

et al. 2022

Advanced Materials

View full text Add to dashboard Cite

energy density. [3] Fortunately, the exploration of novel configurations of K-based energy storage systems is expected to provide key breakthroughs in overcoming performance bottlenecks. [4] An anode-free battery archi tecture tactfully eliminates active anode materials by pairing a fully preintercalated cathode with a bare anode current collector, thereby endowing the full-cell with increased energy density. [5] Pint et al. constructed an anode-free Na-metal battery using sodiated pyrite as the cathode and Al foils modified with a carbon nucleation layer as the anode current collector, achieving an energy density of ≈400 Wh kg −1 . [4a] Meanwhile, Luo et al. reported an anode-free porous Al||presodiated TiS 2 full-cell with increased energy density. [6] Recently, Mitlin et al. devised an innovative anode-free Na-metal battery comprising a Na 2 (Sb 2/6 Te 3/6 Vac 1/6 ) current collector and Na 3 V 2 (PO 4 ) 3 cathode, obtaining a capacity decay of only 0.23% per cycle. [7] Despite these achievements, anode-free K-metal batteries have rarely been explored.Besides possessing advantages over Cu in terms of cost and weight, Al foil can function as an anode current collector in anode-free K-metal batteries. [8] However, commercial Al current collectors are electrochemically potassiophobic and exhibit high nucleation resistance, inducing uneven electrochemical K deposition. [9] This results in poor reversibility during the plating/stripping process, which is reflected by a low Coulombic efficiency (CE). As anode-free K-metal batteries possess a finite K inventory in the cathode, the low CE might eventually result in capacity plunge and battery failure. [5,10] Therefore, it is of core significance to modulate the nucleation-growth behavior of K on an Al current collector through scalable and delicate surface modification. [11] Various conceptual models have been proposed to reveal the electrochemical growth behavior of metals that are complementary toward each other. [12] Recently, a film growth model was established to explain the growth of metals from a new perspective. [13] In this model, the electrochemical plating of K can be analogized as thin-film growth in vacuum and is governed by the surface energy of the substrate. [14] Based on this model, it is feasible to tune the surface energy of an Al current collector to ameliorate the nucleation-growth behavior Potassium (K)-metal batteries have emerged as a promising energy-storage device owing to abundant K resources. An anode-free architecture that bypasses the need for anode host materials can deliver an elevated energy density. However, the poor efficiency of K plating/stripping on potassiophobic anode current collectors results in rapid K inventory loss and a short cycle life. Herein, commercial Al foils are decorated with an ultrathin graphenemodified layer (Al@G) through roll-to-roll plasma-enhanced chemical vapor deposition. By harnessing strong adhesion (10.52 N m −1 ) and a high surface energy (66.6 mJ m −2 ), the designed Al@G structure ensures a highly...

show abstract

Section: Resultsmentioning

confidence: 99%

An Anode‐Free Potassium‐Metal Battery Enabled by a Directly Grown Graphene‐Modulated Aluminum Current Collector

Zhao

Liu

et al. 2022

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Electrochemical impedance spectroscopy (EIS) analysis presents that the kinetics of lithium ion transport is faster in the LiFePO 4 /GAF battery than in the LiFePO 4 /Al battery (Figures S10 and S11). At least two reasons can account for this: First, the surface of GAF is much rougher than that of Al foil, which makes the contact between GAF and the active material closer. Second, GAF and conductive carbon black have the same work function, while Al foil and conductive carbon black have different work functions in the cell, which allows electrons to pass through the interface between GAF and the active material more smoothly. , …”

Section: Resultsmentioning

confidence: 99%

Highly Reduced Graphene Assembly Film as Current Collector for Lithium Ion Batteries

Zhao

Yang

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

With the development of lithium ion batteries (LIBs), further increasing the energy densities of batteries is urgent. Graphene, with excellent chemical stability, high conductivity, and light weight, is an ideal material to improve the battery energy density by replacing traditional metal current collectors. Accordingly, we report a large-size (120 mm × 120 mm) graphene assembled film (GAF) with high crystallinity, electrical conductivity ((2.30 ± 0.06) × 105 S m–1) and ultralight weight (3.18 mg cm–2). The electrode/GAF interface has better wetting and lower contact resistance. When all the metal (Al/Cu) current collectors are replaced by GAF, the energy density of the full cell electrode can increase by 32.9% (with an areal density of 4 mAh cm–2). Moreover, the electrode with GAF current collectors shows improvements in cycling stability, rate capability, and capacity. Undoubtedly, these results suggest that GAF has broad prospects as a high-energy-density lithium ion current collector.

show abstract

“…(2) large interfacial electric resistance resulting from the poor contact and weak adhesion between current collectors and electrode materials (Fig. 11(a)), which hampers the rate capability especially for flexible LIBs [133]. With high electrical conductivity, low mass density, and structural tunability, graphene has been widely reported as the free-standing CC or the conductive coating on the traditional CC for LIBs to achieve better wetting, stronger adhesion, greater mechanical durability, and lower contact resistance (Figs.…”

Section: Current Collectormentioning

confidence: 99%

“…Interface design between current collector and electroactive materials plays a key role in the charge transport for lithiumion batteries. Graphene-coated metal foils as current collectors benefit rate capability as the graphene coating could effectively reduce interfacial electric resistance [133,135,[140][141][142]. Recently, Hailin Peng et al proved interfacial electric resistance dominates, i.e., ~ 2 orders of magnitude higher than that of electrode materials, through systematic quantitative studies of the interfacial properties.…”

Section: Coating On Current Collectormentioning

confidence: 99%

“…11(d)), wherein the graphene coating constructed a powerful electronic network between the current collector and electrode materials. The LFP electrodes on the graphene-coated Al current collector delivered a power density output of ~ 5,300 W•kg -1 at an energy density of ~ 220 Wh•kg -1 , whereas the LFP electrode on the Al current collector could deliver only ~ 3,700 W•kg −1 at ~ 21 Wh•kg −1 [133]. To achieve ultrafast cycling performances, Hyo-Jin Ahn's group emphasized the importance of high electrical conductivity of the coating layer on Al current collectors and successfully fabricated an N-and F-doped graphene interfacial layer on micropatterned Al foil using roll pressing and dip coating processes (Fig.…”

Section: Coating On Current Collectormentioning

confidence: 99%

See 1 more Smart Citation

Graphene: A promising candidate for charge regulation in high-performance lithium-ion batteries

et al. 2021

View full text Add to dashboard Cite

The development of rechargeable lithium-ion batteries (LIBs) is being driven by the ever-increasing demand for high energy density and excellent rate performance. Charge transfer kinetics and polarization theory, considered as basic principles for charge regulation in the LIBs, indicate that the rapid transfer of both electrons and ions is vital to the electrochemical reaction process. Graphene, a promising candidate for charge regulation in high-performance LIBs, has received extensive investigations due to its excellent carrier mobility, large specific surface area and structure tunability, etc. Recent progresses on the structural design and interfacial modification of graphene to regulate the charge transport in LIBs have been summarized. Besides, the structureperformance relationships between the structure of the graphene and its dedicated applications for LIBs have also been clarified in detail. Taking graphene as a typical example to explore the mechanism of charge regulation will outline ways to further understand and improve carbon-based nanomaterials towards the next generation of electrochemical energy storage devices.

show abstract

Quantitative Analyses of the Interfacial Properties of Current Collectors at the Mesoscopic Level in Lithium Ion Batteries by Using Hierarchical Graphene

Cited by 19 publications

References 42 publications

An Anode‐Free Potassium‐Metal Battery Enabled by a Directly Grown Graphene‐Modulated Aluminum Current Collector

An Anode‐Free Potassium‐Metal Battery Enabled by a Directly Grown Graphene‐Modulated Aluminum Current Collector

Highly Reduced Graphene Assembly Film as Current Collector for Lithium Ion Batteries

Graphene: A promising candidate for charge regulation in high-performance lithium-ion batteries

Contact Info

Product

Resources

About