Interconnected Ni(HCO3)2 Hollow Spheres Enabled by Self-Sacrificial Templating with Enhanced Lithium Storage Properties

Shiqiang Zhao; Zewei Wang; Yanjie He; Beibei Jiang; Yeuwei Harn; Xueqin Liu; Faqi Yu; Fan Feng; Qiang Shen; Zhiqun Lin

doi:10.1021/acsenergylett.6b00582

Interconnected Ni(HCO₃)₂ Hollow Spheres Enabled by Self-Sacrificial Templating with Enhanced Lithium Storage Properties

Shiqiang Zhao, Zewei Wang, Yanjie He, Beibei Jiang, Yeuwei Harn, Xueqin Liu, Faqi Yu, Fan Feng, Qiang Shen, Zhiqun Lin

Department of Chemistry & Nanoscience

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

106 Scopus citations

Abstract

Interconnected nickel bicarbonate (Ni(HCO₃)₂) hollow spheres were produced and exploited for the first time as an anode of lithium ion batteries, delivering the 80th reversible capacity of 1442 mAh g^-1 at a current rate of 100 mA g^-1, which is 3.9 times the theoretical capacity of commercial anode graphite. The time-dependent study suggested a self-sacrificial templating formation mechanism that yielded intriguing interconnected hollow structures. X-ray photoelectron spectroscopy measurements on cycled electrodes indicated that both the deep oxidation of Ni²⁺ into Ni³⁺ and the reversible reactions in HCO₃ ^- accounted for the ultrahigh capacity of Ni(HCO₃)₂ in comparison to its generally accepted theoretical capacity of 297 mAh g^-1. Morphological characterizations revealed that the interconnected hollow structures enabled the enhanced rate performance and cycling stability, compared to those of the solid counterpart, because of their larger contact areas with electrolyte and better buffering effect to accommodate the volume change.

Original language	English
Pages (from-to)	111-116
Number of pages	6
Journal	ACS Energy Letters
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.6b00582
State	Published - 13 Jan 2017

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

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10.1021/acsenergylett.6b00582

Cite this

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title = "Interconnected Ni(HCO3)2 Hollow Spheres Enabled by Self-Sacrificial Templating with Enhanced Lithium Storage Properties",

abstract = "Interconnected nickel bicarbonate (Ni(HCO3)2) hollow spheres were produced and exploited for the first time as an anode of lithium ion batteries, delivering the 80th reversible capacity of 1442 mAh g-1 at a current rate of 100 mA g-1, which is 3.9 times the theoretical capacity of commercial anode graphite. The time-dependent study suggested a self-sacrificial templating formation mechanism that yielded intriguing interconnected hollow structures. X-ray photoelectron spectroscopy measurements on cycled electrodes indicated that both the deep oxidation of Ni2+ into Ni3+ and the reversible reactions in HCO3 - accounted for the ultrahigh capacity of Ni(HCO3)2 in comparison to its generally accepted theoretical capacity of 297 mAh g-1. Morphological characterizations revealed that the interconnected hollow structures enabled the enhanced rate performance and cycling stability, compared to those of the solid counterpart, because of their larger contact areas with electrolyte and better buffering effect to accommodate the volume change.",

author = "Shiqiang Zhao and Zewei Wang and Yanjie He and Beibei Jiang and Yeuwei Harn and Xueqin Liu and Faqi Yu and Fan Feng and Qiang Shen and Zhiqun Lin",

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AU - Zhao, Shiqiang

AU - Wang, Zewei

AU - He, Yanjie

AU - Jiang, Beibei

AU - Harn, Yeuwei

AU - Liu, Xueqin

AU - Yu, Faqi

AU - Feng, Fan

AU - Shen, Qiang

AU - Lin, Zhiqun

PY - 2017/1/13

Y1 - 2017/1/13

N2 - Interconnected nickel bicarbonate (Ni(HCO3)2) hollow spheres were produced and exploited for the first time as an anode of lithium ion batteries, delivering the 80th reversible capacity of 1442 mAh g-1 at a current rate of 100 mA g-1, which is 3.9 times the theoretical capacity of commercial anode graphite. The time-dependent study suggested a self-sacrificial templating formation mechanism that yielded intriguing interconnected hollow structures. X-ray photoelectron spectroscopy measurements on cycled electrodes indicated that both the deep oxidation of Ni2+ into Ni3+ and the reversible reactions in HCO3 - accounted for the ultrahigh capacity of Ni(HCO3)2 in comparison to its generally accepted theoretical capacity of 297 mAh g-1. Morphological characterizations revealed that the interconnected hollow structures enabled the enhanced rate performance and cycling stability, compared to those of the solid counterpart, because of their larger contact areas with electrolyte and better buffering effect to accommodate the volume change.

AB - Interconnected nickel bicarbonate (Ni(HCO3)2) hollow spheres were produced and exploited for the first time as an anode of lithium ion batteries, delivering the 80th reversible capacity of 1442 mAh g-1 at a current rate of 100 mA g-1, which is 3.9 times the theoretical capacity of commercial anode graphite. The time-dependent study suggested a self-sacrificial templating formation mechanism that yielded intriguing interconnected hollow structures. X-ray photoelectron spectroscopy measurements on cycled electrodes indicated that both the deep oxidation of Ni2+ into Ni3+ and the reversible reactions in HCO3 - accounted for the ultrahigh capacity of Ni(HCO3)2 in comparison to its generally accepted theoretical capacity of 297 mAh g-1. Morphological characterizations revealed that the interconnected hollow structures enabled the enhanced rate performance and cycling stability, compared to those of the solid counterpart, because of their larger contact areas with electrolyte and better buffering effect to accommodate the volume change.

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