Synthesis of hollow GeO2 nanostructures, transformation into Ge@C, and lithium storage properties

Li Li; Kuok Hau Seng; Chuanqi Feng; Hua Kun Liu; Zaiping Guo

doi:10.1039/c3ta11381g

Synthesis of hollow GeO₂ nanostructures, transformation into Ge@C, and lithium storage properties

Li Li
, Kuok Hau Seng
, Chuanqi Feng
, Hua Kun Liu
, Zaiping Guo

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

64 Citations (Scopus)

Abstract

In this work, we synthesize mesoporous and hollow germanium@carbon nanostructures through simultaneous carbon coating and reduction of a hollow ellipsoidal GeO₂ precursor. The formation mechanism of GeO ₂ ellipsoids and the ratio of Ge⁴⁺ to Sn⁴⁺ as the starting materials are also investigated. Compared to the solid ellipsoidal Ge@carbon (Ge@C-3), the hollow ellipsoidal Ge@C-1 sample exhibits better cycling stability (100% capacity retention after 200 cycles at the 0.2 C rate) and higher rate capability (805 mA h g^-1 at 20 C) compared to Ge@C-3 due to its unique hollow structure; therefore, this hollow ellipsoidal Ge@carbon can be considered as a potential anode material for lithium ion batteries. © 2013 The Royal Society of Chemistry.

Original language	English
Pages (from-to)	7666-7672
Journal	Journal of Materials Chemistry A
Volume	1
Issue number	26
DOIs	https://doi.org/10.1039/c3ta11381g
Publication status	Published - 2013
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was funded by an Australian Research Council (ARC) Discovery Project (DP1094261).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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Cite this

@article{b121ad196a0f4f84a47513c048724c53,

title = "Synthesis of hollow GeO2 nanostructures, transformation into Ge@C, and lithium storage properties",

abstract = "In this work, we synthesize mesoporous and hollow germanium@carbon nanostructures through simultaneous carbon coating and reduction of a hollow ellipsoidal GeO2 precursor. The formation mechanism of GeO 2 ellipsoids and the ratio of Ge4+ to Sn4+ as the starting materials are also investigated. Compared to the solid ellipsoidal Ge@carbon (Ge@C-3), the hollow ellipsoidal Ge@C-1 sample exhibits better cycling stability (100\% capacity retention after 200 cycles at the 0.2 C rate) and higher rate capability (805 mA h g-1 at 20 C) compared to Ge@C-3 due to its unique hollow structure; therefore, this hollow ellipsoidal Ge@carbon can be considered as a potential anode material for lithium ion batteries. {\textcopyright} 2013 The Royal Society of Chemistry.",

author = "Li Li and Seng, \{Kuok Hau\} and Chuanqi Feng and Liu, \{Hua Kun\} and Zaiping Guo",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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TY - JOUR

T1 - Synthesis of hollow GeO2 nanostructures, transformation into Ge@C, and lithium storage properties

AU - Li, Li

AU - Seng, Kuok Hau

AU - Feng, Chuanqi

AU - Liu, Hua Kun

AU - Guo, Zaiping

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013

Y1 - 2013

N2 - In this work, we synthesize mesoporous and hollow germanium@carbon nanostructures through simultaneous carbon coating and reduction of a hollow ellipsoidal GeO2 precursor. The formation mechanism of GeO 2 ellipsoids and the ratio of Ge4+ to Sn4+ as the starting materials are also investigated. Compared to the solid ellipsoidal Ge@carbon (Ge@C-3), the hollow ellipsoidal Ge@C-1 sample exhibits better cycling stability (100% capacity retention after 200 cycles at the 0.2 C rate) and higher rate capability (805 mA h g-1 at 20 C) compared to Ge@C-3 due to its unique hollow structure; therefore, this hollow ellipsoidal Ge@carbon can be considered as a potential anode material for lithium ion batteries. © 2013 The Royal Society of Chemistry.

AB - In this work, we synthesize mesoporous and hollow germanium@carbon nanostructures through simultaneous carbon coating and reduction of a hollow ellipsoidal GeO2 precursor. The formation mechanism of GeO 2 ellipsoids and the ratio of Ge4+ to Sn4+ as the starting materials are also investigated. Compared to the solid ellipsoidal Ge@carbon (Ge@C-3), the hollow ellipsoidal Ge@C-1 sample exhibits better cycling stability (100% capacity retention after 200 cycles at the 0.2 C rate) and higher rate capability (805 mA h g-1 at 20 C) compared to Ge@C-3 due to its unique hollow structure; therefore, this hollow ellipsoidal Ge@carbon can be considered as a potential anode material for lithium ion batteries. © 2013 The Royal Society of Chemistry.

UR - https://www.scopus.com/pages/publications/84880062267

UR - https://www.scopus.com/pages/publications/84880062267#tab=impact

U2 - 10.1039/c3ta11381g

DO - 10.1039/c3ta11381g

M3 - RGC 21 - Publication in refereed journal

SN - 2050-7488

VL - 1

SP - 7666

EP - 7672

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 26

ER -