High-performance mesoporous LiFePO4 from Baker's yeast

Luo

et al. 2015

Ionics

Nitrogen-doped carbon nanofiber (NCNF) decorated LiFePO 4 (LFP) composites are synthesized via an in situ hydrothermal growth method. Electrochemical performance results show that the embedded NCNF can improve electron and ion transfer, thereby resulting in excellent cycling performance. The as-prepared LFP and NCNF composites exhibit excellent electrochemical properties with discharge capacities of 188.9 mAh g −1 (at 0.2 C) maintained at 167.9 mAh g −1 even after 200 charge/discharge cycles. The electrode also presents a good rate capability of 10 C and a reversible specific capacity as high as 95.7 mAh g −1 . LFP composites are a potential alternative high-performing anode material for lithium ion batteries.

Section: Electrochemical Performance Analysismentioning

confidence: 56%

Nitrogen-doped carbon nanofiber decorated LiFePO4 composites with superior performance for lithium-ion batteries

Wang

Luo

et al. 2015

Ionics

“…Numerous materials with various potential applications have been prepared via bionic methods. [19][20][21][22] Remarkably, biological systems have the ability to fabricate extraordinary inorganic structures and morphologies via the process of biomineralization, and both amorphous and crystalline materials can be synthesized. 3,4,23 Compared with other fabrication processes, biomimetic synthesis processes are much more competent at the molecular control of the structure, size, aggregation, morphology and crystallographic orientation of inorganic materials, and can also synthesize materials in a more environmentally mild system.…”

Section: Xudong Zhangmentioning

confidence: 99%

Fabricating high performance lithium-ion batteries using bionanotechnology

Hou

et al. 2015

Nanoscale

Self Cite

Designing, fabricating, and integrating nanomaterials are key to transferring nanoscale science into applicable nanotechnology. Many nanomaterials including amorphous and crystal structures are synthesized via biomineralization in biological systems. Amongst various techniques, bionanotechnology is an effective strategy to manufacture a variety of sophisticated inorganic nanomaterials with precise control over their chemical composition, crystal structure, and shape by means of genetic engineering and natural bioassemblies. This provides opportunities to use renewable natural resources to develop high performance lithium-ion batteries (LIBs). For LIBs, reducing the sizes and dimensions of electrode materials can boost Li(+) ion and electron transfer in nanostructured electrodes. Recently, bionanotechnology has attracted great interest as a novel tool and approach, and a number of renewable biotemplate-based nanomaterials have been fabricated and used in LIBs. In this article, recent advances and mechanism studies in using bionanotechnology for high performance LIBs studies are thoroughly reviewed, covering two technical routes: (1) Designing and synthesizing composite cathodes, e.g. LiFePO4/C, Li3V2(PO4)3/C and LiMn2O4/C; and (2) designing and synthesizing composite anodes, e.g. NiO/C, Co3O4/C, MnO/C, α-Fe2O3 and nano-Si. This review will hopefully stimulate more extensive and insightful studies on using bionanotechnology for developing high-performance LIBs.

“…With the aid of template technology, a variety of 3D porous LiFePO 4 materials have been synthesized. [128][129][130] In 2013, Zhang's group 131 successfully prepared 3D mesoporous LiFePO 4 using Baker's yeast cells both as a structural template and a biocarbon source. The asobtained LiFePO 4 exhibited a high discharge capacity of about 153 mA h g À1 at 0.1 C.…”

Section: Phase Transition Between Lifepo 4 and Fepomentioning

confidence: 99%

Mechanism studies of LiFePO₄cathode material: lithiation/delithiation process, electrochemical modification and synthetic reaction

et al. 2014

RSC Adv.

Olivine-structured lithium ion phosphate (LiFePO 4 ) is one of the most competitive candidates of energydriven cathode material for sustainable lithium ion battery (LIB) systems. However, the high electrochemical performance is significantly limited by the slow diffusivity of Li-ion in LiFePO 4 (ca. 10 -10 14 cm 2 ·s -1 ) together with the low electronic conductivity (ca. 10 -9 S·cm -1 ), which is the big challenge we are currently facing. To resolve the challenge, many efforts have been directed to dynamics of lithiation/delithiation process in Li x FePO 4 (0≤x≤1), mechanism of electrochemical modification, and synthetic reaction process, which are all crucial for the development of high electrochemical performance for LiFePO 4 material. In this review, in order to reflect the recent progress ranging from very 15 fundamentals to practical applications, we specifically focus on mechanism studies of LiFePO 4 including lithiation/delithiation process, electrochemical modification and synthetic reaction. Firstly, we highlight Li-ion diffusion pathway in Li x FePO 4 and phase translation of Li x FePO 4 . Then we summarize the modification mechanism of LiFePO 4 with high-rated capability, excellent low-temperatured performance and high energy density. Finally, we discuss synthetic reaction mechanism of high-temperatured 20 carbothermal reaction route and low-temperatured hydrothermal/solvothermal reaction route.