Mesoporous Ge/GeO2/carbon lithium-ion battery anodes with high capacity and high reversibility

Jongkook Hwang; Changshin Jo; Min Gyu Kim; Jinyoung Chun; Eunho Lim; Seongseop Kim; Sanha Jeong; Youngsik Kim; Jinwoo Lee

doi:10.1021/acsnano.5b00817

Mesoporous Ge/GeO₂/carbon lithium-ion battery anodes with high capacity and high reversibility

Jongkook Hwang
, Changshin Jo
, Min Gyu Kim
, Jinyoung Chun
, Eunho Lim
, Seongseop Kim
, Sanha Jeong
, Youngsik Kim
, Jinwoo Lee

Department of Chemical and Biochemical Engineering

Pohang University of Science and Technology
Pohang Accelerator Laboratory
Ulsan National Institute of Science and Technology

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

164 Scopus citations

Abstract

We report mesoporous composite materials (m-GeO₂, m-GeO₂/C, and m-Ge-GeO₂/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO₂/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g^-1), and stable cycle life compared with the other mesoporous and bulk GeO₂ electrodes. m-Ge/GeO₂/C exhibits one of the highest areal capacities (1.65 mA h cm^-2) among previously reported Ge- and GeO₂-based anodes. The superior electrochemical performance in m-Ge/GeO₂/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.

Original language	English
Pages (from-to)	5299-5309
Number of pages	11
Journal	ACS Nano
Volume	9
Issue number	5
DOIs	https://doi.org/10.1021/acsnano.5b00817
State	Published - 26 May 2015

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

block copolymer
catalytic function
germanium oxide
lithium-ion batteries
mesoporous materials

Access to Document

10.1021/acsnano.5b00817

Cite this

@article{4cf72c1cb9de4dd69410ca7f35a9b79c,

title = "Mesoporous Ge/GeO2/carbon lithium-ion battery anodes with high capacity and high reversibility",

abstract = "We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g-1), and stable cycle life compared with the other mesoporous and bulk GeO2 electrodes. m-Ge/GeO2/C exhibits one of the highest areal capacities (1.65 mA h cm-2) among previously reported Ge- and GeO2-based anodes. The superior electrochemical performance in m-Ge/GeO2/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.",

keywords = "block copolymer, catalytic function, germanium oxide, lithium-ion batteries, mesoporous materials",

author = "Jongkook Hwang and Changshin Jo and Kim, \{Min Gyu\} and Jinyoung Chun and Eunho Lim and Seongseop Kim and Sanha Jeong and Youngsik Kim and Jinwoo Lee",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = may,

day = "26",

doi = "10.1021/acsnano.5b00817",

language = "English",

volume = "9",

pages = "5299--5309",

journal = "ACS Nano",

issn = "1936-0851",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Mesoporous Ge/GeO2/carbon lithium-ion battery anodes with high capacity and high reversibility

AU - Hwang, Jongkook

AU - Jo, Changshin

AU - Kim, Min Gyu

AU - Chun, Jinyoung

AU - Lim, Eunho

AU - Kim, Seongseop

AU - Jeong, Sanha

AU - Kim, Youngsik

AU - Lee, Jinwoo

PY - 2015/5/26

Y1 - 2015/5/26

N2 - We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g-1), and stable cycle life compared with the other mesoporous and bulk GeO2 electrodes. m-Ge/GeO2/C exhibits one of the highest areal capacities (1.65 mA h cm-2) among previously reported Ge- and GeO2-based anodes. The superior electrochemical performance in m-Ge/GeO2/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.

AB - We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g-1), and stable cycle life compared with the other mesoporous and bulk GeO2 electrodes. m-Ge/GeO2/C exhibits one of the highest areal capacities (1.65 mA h cm-2) among previously reported Ge- and GeO2-based anodes. The superior electrochemical performance in m-Ge/GeO2/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.

KW - block copolymer

KW - catalytic function

KW - germanium oxide

KW - lithium-ion batteries

KW - mesoporous materials

UR - https://www.scopus.com/pages/publications/84930221702

U2 - 10.1021/acsnano.5b00817

DO - 10.1021/acsnano.5b00817

M3 - Article

AN - SCOPUS:84930221702

SN - 1936-0851

VL - 9

SP - 5299

EP - 5309

JO - ACS Nano

JF - ACS Nano

IS - 5

ER -