In situ separator modification via CVD-derived N-doped carbon for highly reversible Zn metal anodes

Yang, Xianzhong; Li, Weiping; Lv, Jiaze; Sun, Guangling; Shi, Zixiong; Su, Yiwen; Lian, Xueyu; Shao, Yanyan; Zhi, Aomiao; Tian, Xuezeng; Bai, Xuedong; Liu, Zhongfan; Sun, Jingyu

doi:10.1007/s12274-021-3957-z

Cited by 40 publications

(20 citation statements)

References 39 publications

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“…Equally importantly, an ideal separator would facilitate ion transport whilst block electron transfer to avoid short circuits. [26] In this sense, the ionic conductivity of separators was probed by electrochemical impedance spectroscopy (EIS) analysis. [27] By fitting with equivalent circuits, the ionic conductivity of bare GF and MXene-GF is measured to be 3.0 and 14.4 mS cm −1 , respectively (Figure S7, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes

Liu

Zhang

et al. 2022

Adv Funct Materials

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Separator modification has recently blossomed as an effective strategy to enable dendrite‐free Zn metal anodes. Nonetheless, the explored avenues are not conducive to mass production by far, and little attention is paid to the essence of separator regulation. Herein, a scalable Ti3C2Tx MXene‐decorated Janus separator is designed by spray‐printing MXene nanosheets over one side of commercial glass fibre (GF). The thus‐derived MXene‐GF separator affords abundant surface polar groups, good electrolyte wettability, and high ionic conductivity, which is beneficial to homogenizing local current distribution and promoting Zn nucleation kinetics. It is noted that MXene‐GF displays adjustable dielectric constants with an optimized value of 53.5, offering a directional electrical field to expedite Zn‐ion flux and repel anions. Accordingly, dendrite‐free Zn anode equipped within symmetric cells can be achieved with MXene‐GF, enabling a stable cycling for 1180 h at 1 mA cm−2 and 1200 h at 5 mA cm−2. More impressively, the assembled aqueous Zn‐ion battery full cell with Janus MXene‐GF separator realizes a favorable capacity retention ratio (77.9%) upon cycling for 1000 cycles at 5.0 A g−1. This strategy with scalability and effectiveness offers a new insight into high‐performance metal anodes.

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Section: Resultsmentioning

confidence: 99%

Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes

Liu

Zhang

et al. 2022

Adv Funct Materials

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“…With the consideration of the low melting point of Zn, a PECVD route [ 22 ] was devised to in-situ grow conformal NOC layer directly on commercial Zn foil at a temperature range of 300 − 400°C. As depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Mosaic Nanocrystalline Graphene Skin Empowers Pragmatic Zn Metal Anodes

Yang¹,

Lv²,

Cheng

et al. 2022

Preprint

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Constructing a conductive carbon-based artificial interphase layer (AIL) to inhibit dendritic formation and side reaction plays a pivotal role in achieving longevous Zn anodes. Distinct from the previously reported carbonaceous overlayers with sigular dopants and thick foreign coatings, a new type of N/O co-doped carbon skin with ultrathin feature (i.e., 20 nm thickness) is developed via the direct chemical vapor deposition growth over Zn foil. Throughout fine-tuning the growth conditions, mosaic nanocrystalline graphene could be obtained, which is proven crucial to enable the orientational deposition along Zn (002), thereby inducing a planar Zn texture. Moreover, the abundant heteroatoms help reduce the solvation energy and accelerate the reaction kinetics. As a result, dendrite growth, hydrogen evolution and side reactions are concurrently mitigated. Symmetric cell harvests durable electrochemical cycling of 3040 h at 1.0 mA cm− 2/1.0 mAh cm− 2 and 136 h at 30.0 mA cm− 2/30.0 mAh cm− 2. Assembled full battery further realizes elongated lifespans under stringent conditions of fast charging, bending operation and low N/P ratio. This strategy opens up a new avenue for the in-situ construction of conductive AIL toward pragmatic Zn anode.

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“…Aside from the current collector, the separator serving as another inactive component also plays a pivotal role in affecting metal deposition. − Although surface modification of functional materials via blade casting or suction filtration can help homogenize metal deposition and mitigate dendrite formation toward stabilized metal anodes, these surface engineering strategies suffer from mediocre electric conductivity, weak interfacial interaction, and excessive mass proportion. Encouragingly, the fruitful progress with respect to the direct-CVD growth of graphene on the insulating glass offers a potential possibility for directly growing graphene on a typical glass fiber separator and hence circumventing the issues aforementioned . In this respect, Li et al utilized the low-temperature PECVD technique to in situ grow conformal VG carpet on the pristine separator .…”

Section: Versatility and Essentiality Of Direct-cvd-enabled Graphenementioning

confidence: 99%

“…Encouragingly, the fruitful progress with respect to the direct-CVD growth of graphene on the insulating glass offers a potential possibility for directly growing graphene on a typical glass fiber separator and hence circumventing the issues aforementioned. 100 In this respect, Li et al utilized the lowtemperature PECVD technique to in situ grow conformal VG carpet on the pristine separator. 101 The thus-derived VGcoated separator further undergoes a moderate air plasma treatment with the aim to incorporate the zincophilic function groups into the VG array.…”

Section: Homogenizing Metal Depositionmentioning

confidence: 99%

Direct-Chemical Vapor Deposition-Enabled Graphene for Emerging Energy Storage: Versatility, Essentiality, and Possibility

Shi

Yang

et al. 2022

ACS Nano

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The direct chemical vapor deposition (CVD) technique has stimulated an enormous scientific and industrial interest to enable the conformal growth of graphene over multifarious substrates, which readily bypasses tedious transfer procedure and empowers innovative materials paradigm. Compared to the prevailing graphene materials (i.e., reduced graphene oxide and liquid-phase exfoliated graphene), the direct-CVD-enabled graphene harnesses appealing structural advantages and physicochemical properties, accordingly playing a pivotal role in the realm of electrochemical energy storage. Despite conspicuous progress achieved in this frontier, a comprehensive overview is still lacking by far and the synthesis-structure-property-application nexus of direct-CVD-enabled graphene remains elusive. In this topical review, rather than simply compiling the state-of-the-art advancements, the versatile roles of direct-CVD-enabled graphene are itemized as (i) modificator, (ii) cultivator, (iii) defender, and (iv) decider. Furthermore, essential effects on the performance optimization are elucidated, with an emphasis on fundamental properties and underlying mechanisms. At the end, perspectives with respect to the material production and device fabrication are sketched, aiming to navigate the future development of direct-CVD-enabled graphene en-route toward pragmatic energy applications and beyond.

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In situ separator modification via CVD-derived N-doped carbon for highly reversible Zn metal anodes

Cited by 40 publications

References 39 publications

Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes

Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes

Mosaic Nanocrystalline Graphene Skin Empowers Pragmatic Zn Metal Anodes

Direct-Chemical Vapor Deposition-Enabled Graphene for Emerging Energy Storage: Versatility, Essentiality, and Possibility

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In situ separator modification via CVD-derived N-doped carbon for highly reversible Zn metal anodes

Cited by 40 publications

References 39 publications

Printing‐Scalable Ti3C2Tx MXene‐Decorated Janus Separator with Expedited Zn2+ Flux toward Stabilized Zn Anodes

Printing‐Scalable Ti3C2Tx MXene‐Decorated Janus Separator with Expedited Zn2+ Flux toward Stabilized Zn Anodes

Mosaic Nanocrystalline Graphene Skin Empowers Pragmatic Zn Metal Anodes

Direct-Chemical Vapor Deposition-Enabled Graphene for Emerging Energy Storage: Versatility, Essentiality, and Possibility

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Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes

Printing‐Scalable Ti₃C₂T_x MXene‐Decorated Janus Separator with Expedited Zn²⁺ Flux toward Stabilized Zn Anodes