Carbon-Free Porous Zn2GeO4Nanofibers as Advanced Anode Materials for High-Performance Lithium Ion Batteries.
In this work, carbon-free, porous, and micro/nanostructural Zn2GeO4nanofibers (p-ZGONFs) have been prepared via a dissolution-recrystallization-assisted electrospinning technology. The successful electrospinning to fabricate the uniform p-ZGONFs mainly benefits from the preparation of completely dissolved solution, which avoids the sedimentation of common Ge-containing solid-state precursors. Electrochemical tests demonstrate that the as-prepared p-ZGONFs exhibit superior Li-storage properties in terms of high initial reversible capacity of 1075.6 mA h g-1, outstanding cycling stability (no capacity decay after 130 cycles at 0.2 A g-1), and excellent high-rate capabilities (e.g., still delivering a capacity of 384.7 mA h g-1at a very high current density of 10 A g-1) when used as anode materials for lithium ion batteries (LIBs). All these Li-storage properties are much better than those of Zn2GeO4nanorods prepared by a hydrothermal process. The much enhanced Li-storage properties should be attributed to its distinctive structural characteristics including the carbon-free composition, plentiful pores, and macro/nanostructures. Carbon-free composition promises its high theoretical Li-storage capacity, and plentiful pores cannot only accommodate the volumetric variations during the successive lithiation/delithiation but can also serve as the electrolyte reservoirs to facilitate Li interaction with electrode materials.
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Huan-Huan
HH
Li
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.|School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.
Xing-Long
XL
Wu
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Lin-Lin
LL
Zhang
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Chao-Ying
CY
Fan
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Hai-Feng
HF
Wang
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Xiao-Ying
XY
Li
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Hai-Zhu
HZ
Sun
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun, Jilin 130024, China.
Jing-Ping
JP
Zhang
School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.
Qingyu
Q
Yan
Zn2GeO4; anode materials; carbon-free; electrospinning; lithium ion batteries