<scp>Single‐Atom</scp> Lithiophilic Sites Confined within Ordered Porous Carbon for <scp>Ultrastable</scp> Lithium Metal Anodes

Huang, Wenzhong; Liu, Shanlin; Yu, Ruohan; Zhou, Liang; Liu, Zhenhui; Mai, Liqiang

doi:10.1002/eem2.12466

Cited by 12 publications

(8 citation statements)

References 39 publications

(61 reference statements)

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“…The FT-IR spectrum results of CCNM and SDBS-CCNMs are shown in Figure (d). The stretching vibration absorption peak strength of O–H in the hydroxyl group of SDBS-CCNMs is much stronger than that of CCNM at 3440 cm –1 , indicating that SDBS can increase the number of hydroxyl groups. The stretching vibration absorption peak of C–H in methylene represented at 2919 and 2843 cm –1 almost completely disappeared .…”

Section: Resultsmentioning

confidence: 95%

“…The stretching vibration absorption peak strength of O–H in the hydroxyl group of SDBS-CCNMs is much stronger than that of CCNM at 3440 cm –1 , indicating that SDBS can increase the number of hydroxyl groups. The stretching vibration absorption peak of C–H in methylene represented at 2919 and 2843 cm –1 almost completely disappeared . A new absorption peak near 1617 cm –1 observed on the SDBS-CCNMs spectrum was attributed to benzene ring skeleton vibrations ( v CC) .…”

Section: Resultsmentioning

confidence: 95%

“…38,39 According to the above analysis, there is an inevitable relationship between type and quantity of SOFGs and adsorption capacity of water vapor of SDBS-CCNMs. 40 A new absorption peak near 1617 cm −1 observed on the SDBS-CCNMs spectrum was attributed to benzene ring skeleton vibrations (v C�C). 41 The absorption peak at 1384 cm −1 corresponds to the in-plane bending vibration of C−H in a methyl group.…”

Section: Resultsmentioning

confidence: 99%

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Surface Modification of Porous Carbon Nanomaterials for Water Vapor Adsorption

Sun

et al. 2023

ACS Appl. Nano Mater.

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In order to make porous carbon nanomaterial more suitable for the adsorption thermal energy storage field, it is necessary to modify the carbon nanomaterial to enhance water vapor adsorption capacity. This work investigated the influence of anionic surfactant sodium dodecylbenzenesulfonate (SDBS) modification on the physicochemical properties of coffee-shell carbon nanomaterials (CCNMs). The physicochemical properties of carbon nanomaterials were characterized. Water vapor adsorption isotherm, thermodynamics, and kinetics were analyzed to investigate further adsorption behavior over the CCNMs. The results suggest that the highest adsorption capacity of water vapor for modified CCNM (SDBS-CCNM) is up to 833.2 mg/g, with 2% SDBS mass fraction, 500 °C calcination temperature, and 30 min calcination time. However, its BET specific surface area and average pore size are only 2018 m 2 /g and 1.915 nm, respectively. On the other hand, the modification improved the amount of total surface oxygen-containing functional groups (SOFGs), mainly phenolic hydroxyl of SDBS-CCNM, compared with unmodified CCNM, which is conducive to water vapor adsorption on SDBS-CCNM under lower relative pressure. And water contact angles are less than 34°. Furthermore, the dynamic adsorption process of water vapor on CCNMs was described by the Bangham model, which suggests that surface adsorption center sites of SDBS-CCNMs play a significant role in the water vapor adsorption process under lower relative pressure. As relative pressure increases, water molecules form clusters around the water molecules previously adsorbed at the active site through hydrogen-bonding interaction. When the clusters are large enough, water molecules begin to fill the pores of the CCNMs until the adsorption process becomes saturated. All the above results indicate that carbon nanomaterials are hydrophilic. Thus, the modified CCNM obtained in the present work can be a potential carbon nanomaterial with an excellent adsorption capacity for adsorption thermal energy storage.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Surface Modification of Porous Carbon Nanomaterials for Water Vapor Adsorption

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…Studies have shown that encapsulating active Li metal into a host is efficacious in addressing the volume change issue [27][28][29] . Therefore, various micro/nanostructured hosts have been widely studied, including three-dimensional (3D) Cu current collectors [30,31] , reduced graphene oxide [32][33][34][35] , carbon fibers [36][37][38][39] , porous carbon granules [40][41][42][43] , and so on. Combined with the high lithiophilic sites, the plating/stripping behaviors and the cycling performances of the composite metallic Li anode have seen great improvement.…”

Section: Introductionmentioning

confidence: 99%

Stable ultrathin lithium metal anode enabled by self-adapting electrochemical regulating strategy

Zeng,

Wang,

et al. 2024

Energy Mater

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Ultrathin lithium (Li) metal foils with controllable capacity could realize high-specific-energy batteries; however, the pulverization of Li metal foils due to its extreme volume change results in rapid active Li loss and capacity fading. Here, we report a strategy to stabilize ultrathin Li metal anode via in-situ transferring Li from ultrathin Li foil into a well-designed three-dimensional gradient host during a cycling process. A three-dimensional carbon fiber with gradient distribution of Ag nanoparticles is placed on the ultrathin Li foil in advance and acts as a Li reservoir, guiding Li deposition into its interior and thus alleviating the volume change of ultrathin Li foil anodes. Hence, a high reversibility of Li metal is achieved and Li pulverization is suppressed, which can be witnessed by a long cyclic life in the symmetric cells. The proposed method offers a versatile and facile approach for protecting ultrathin Li metal anodes, which will boost their commercial application process.

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“…[ 1–3 ] Lithium (Li) metal anode (LMA) is widely regarded as the promising anode material for next‐generation high‐energy batteries owing to its extremely high theoretical specific capacity (3860 mAh g −1 ) and the lowest electrochemical reduction potential (‐3.04 V versus the standard hydrogen electrode). [ 4–6 ] Nonetheless, the practical applications of LMA are significantly impeded by several major obstructions such as unstable interface, undesired Li dendritic growth, and large volume change. [ 7,8 ] To be specific, the LMA with high activity can react with organic electrolyte to generate a rough and fragile solid electrolyte interphase (SEI) layer, which would destruct and reconstruct during cycling.…”

Section: Introductionmentioning

confidence: 99%

In Situ Formed Gradient Composite Solid Electrolyte Interphase Layer for Stable Lithium Metal Anodes

Zhang

Tong

Liu

et al. 2023

Small

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Lithium (Li) metal anode (LMA) is highly considered as a desirable anode material for next‐generation rechargeable batteries because of its high specific capacity and the lowest reduction potential. However, uncontrollable growth of Li dendrites, large volume change, and unstable interfaces between LMA and electrolyte hinder its practical application. Herein, a novel in situ formed artificial gradient composite solid electrolyte interphase (GCSEI) layer for highly stable LMAs is proposed. The inner rigid inorganics (Li2S and LiF) with high Li+ ion affinity and high electron tunneling barrier are beneficial to achieve homogeneous Li plating, while the flexible polymers (poly(ethylene oxide) and poly(vinylidene fluoride)) on the surface of GCSEI layer can accommodate the volume change. Furthermore, the GCSEI layer demonstrates fast Li+ ion transport capability and increased Li+ ion diffusion kinetics. Accordingly, the modified LMA enables excellent cycling stability (over 1000 h at 3 mA cm−2) in the symmetric cell using carbonate electrolyte, and the corresponding Li‐GCSEI||LiNi0.8Co0.1Mn0.1O2 full cell demonstrates 83.4% capacity retention after 500 cycles. This work offers a new strategy for the design of dendrite‐free LMAs for practical applications.

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Single‐Atom Lithiophilic Sites Confined within Ordered Porous Carbon for Ultrastable Lithium Metal Anodes

Cited by 12 publications

References 39 publications

Surface Modification of Porous Carbon Nanomaterials for Water Vapor Adsorption

Surface Modification of Porous Carbon Nanomaterials for Water Vapor Adsorption

Stable ultrathin lithium metal anode enabled by self-adapting electrochemical regulating strategy

In Situ Formed Gradient Composite Solid Electrolyte Interphase Layer for Stable Lithium Metal Anodes

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