Optimized Phase and Crystallinity of Cr2(NCN)3 Dominating Electrochemical Lithium Storage Performance

Hanlou Li; Feng Wu; Penghui Guo; Silong Zhao; Mengmeng Qian; Chuguang Yu; Ningning Yang; Mokai Cui; Ni Yang; Jing Wang; Yuefeng Su; Guoqiang Tan

doi:10.1021/acs.nanolett.4c01091

Optimized Phase and Crystallinity of Cr₂(NCN)₃ Dominating Electrochemical Lithium Storage Performance

Hanlou Li, Feng Wu^*, Penghui Guo, Silong Zhao, Mengmeng Qian, Chuguang Yu, Ningning Yang, Mokai Cui, Ni Yang, Jing Wang, Yuefeng Su, Guoqiang Tan^*

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Cr₂(NCN)₃ is a potentially high-capacity and fast-charge Li-ion anode owing to its abundant and broad tunnels. However, high intrinsic chemical instability severely restricts its capacity output and electrochemical reversibility. Herein we report an effective crystalline engineering method for optimizing its phase and crystallinity. Systematic studies reveal the relevancy between electrochemical performance and crystalline structure; an optimal Cr₂(NCN)₃ with high phase purity and uniform crystallinity exhibits a high reversible capacity of 590 mAh g^-1 and a stable cycling performance of 478 mAh g^-1 after 500 cycles. In-operando heating XRD reveals its high thermodynamical stability over 600 °C, and in-operando electrochemical XRD proves its electrochemical Li storage mechanism, consisting of the primary Li-ion intercalation and subsequent conversion reactions. This study introduces a facile and low-cost method for fabricating high-purity Cr₂(NCN)₃, and it also confirms that the Li storage of Cr₂(NCN)₃ can be further improved by tuning its phase and crystallinity.

Original language	English
Pages (from-to)	8525-8534
Number of pages	10
Journal	Nano Letters
Volume	24
Issue number	28
DOIs	https://doi.org/10.1021/acs.nanolett.4c01091
Publication status	Published - 17 Jul 2024

Keywords

Cr(NCN)
Li-ion storage
crystalline engineering
crystallinity
phase

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10.1021/acs.nanolett.4c01091

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title = "Optimized Phase and Crystallinity of Cr2(NCN)3 Dominating Electrochemical Lithium Storage Performance",

abstract = "Cr2(NCN)3 is a potentially high-capacity and fast-charge Li-ion anode owing to its abundant and broad tunnels. However, high intrinsic chemical instability severely restricts its capacity output and electrochemical reversibility. Herein we report an effective crystalline engineering method for optimizing its phase and crystallinity. Systematic studies reveal the relevancy between electrochemical performance and crystalline structure; an optimal Cr2(NCN)3 with high phase purity and uniform crystallinity exhibits a high reversible capacity of 590 mAh g-1 and a stable cycling performance of 478 mAh g-1 after 500 cycles. In-operando heating XRD reveals its high thermodynamical stability over 600 °C, and in-operando electrochemical XRD proves its electrochemical Li storage mechanism, consisting of the primary Li-ion intercalation and subsequent conversion reactions. This study introduces a facile and low-cost method for fabricating high-purity Cr2(NCN)3, and it also confirms that the Li storage of Cr2(NCN)3 can be further improved by tuning its phase and crystallinity.",

keywords = "Cr(NCN), Li-ion storage, crystalline engineering, crystallinity, phase",

author = "Hanlou Li and Feng Wu and Penghui Guo and Silong Zhao and Mengmeng Qian and Chuguang Yu and Ningning Yang and Mokai Cui and Ni Yang and Jing Wang and Yuefeng Su and Guoqiang Tan",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

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doi = "10.1021/acs.nanolett.4c01091",

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T1 - Optimized Phase and Crystallinity of Cr2(NCN)3 Dominating Electrochemical Lithium Storage Performance

AU - Li, Hanlou

AU - Wu, Feng

AU - Guo, Penghui

AU - Zhao, Silong

AU - Qian, Mengmeng

AU - Yu, Chuguang

AU - Yang, Ningning

AU - Cui, Mokai

AU - Yang, Ni

AU - Wang, Jing

AU - Su, Yuefeng

AU - Tan, Guoqiang

PY - 2024/7/17

Y1 - 2024/7/17

N2 - Cr2(NCN)3 is a potentially high-capacity and fast-charge Li-ion anode owing to its abundant and broad tunnels. However, high intrinsic chemical instability severely restricts its capacity output and electrochemical reversibility. Herein we report an effective crystalline engineering method for optimizing its phase and crystallinity. Systematic studies reveal the relevancy between electrochemical performance and crystalline structure; an optimal Cr2(NCN)3 with high phase purity and uniform crystallinity exhibits a high reversible capacity of 590 mAh g-1 and a stable cycling performance of 478 mAh g-1 after 500 cycles. In-operando heating XRD reveals its high thermodynamical stability over 600 °C, and in-operando electrochemical XRD proves its electrochemical Li storage mechanism, consisting of the primary Li-ion intercalation and subsequent conversion reactions. This study introduces a facile and low-cost method for fabricating high-purity Cr2(NCN)3, and it also confirms that the Li storage of Cr2(NCN)3 can be further improved by tuning its phase and crystallinity.

AB - Cr2(NCN)3 is a potentially high-capacity and fast-charge Li-ion anode owing to its abundant and broad tunnels. However, high intrinsic chemical instability severely restricts its capacity output and electrochemical reversibility. Herein we report an effective crystalline engineering method for optimizing its phase and crystallinity. Systematic studies reveal the relevancy between electrochemical performance and crystalline structure; an optimal Cr2(NCN)3 with high phase purity and uniform crystallinity exhibits a high reversible capacity of 590 mAh g-1 and a stable cycling performance of 478 mAh g-1 after 500 cycles. In-operando heating XRD reveals its high thermodynamical stability over 600 °C, and in-operando electrochemical XRD proves its electrochemical Li storage mechanism, consisting of the primary Li-ion intercalation and subsequent conversion reactions. This study introduces a facile and low-cost method for fabricating high-purity Cr2(NCN)3, and it also confirms that the Li storage of Cr2(NCN)3 can be further improved by tuning its phase and crystallinity.

KW - Cr(NCN)

KW - Li-ion storage

KW - crystalline engineering

KW - crystallinity

KW - phase

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U2 - 10.1021/acs.nanolett.4c01091

DO - 10.1021/acs.nanolett.4c01091

M3 - Article

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SN - 1530-6984

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SP - 8525

EP - 8534

JO - Nano Letters

JF - Nano Letters

IS - 28

ER -

Optimized Phase and Crystallinity of Cr₂(NCN)₃ Dominating Electrochemical Lithium Storage Performance

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Keywords

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