Electronically conductive phospho-olivines as lithium storage electrodes

  title={Electronically conductive phospho-olivines as lithium storage electrodes},
  author={Sung-Yoon Chung and Jason T Bloking and Yet‐Ming Chiang},
  journal={Nature Materials},
Lithium transition metal phosphates have become of great interest as storage cathodes for rechargeable lithium batteries because of their high energy density, low raw materials cost, environmental friendliness and safety. Their key limitation has been extremely low electronic conductivity, until now believed to be intrinsic to this family of compounds. Here we show that controlled cation non-stoichiometry combined with solid-solution doping by metals supervalent to Li+ increases the electronic… Expand
Electrical and electrochemical behaviour of several LiFexCo1 − xPO4 solid solutions as cathode materials for lithium ion batteries
Several olivine phosphates were investigated in the last years as cathode materials for secondary lithium ion batteries. Among these compounds, LiFexCo1 − xPO4 solid solutions might be interestingExpand
Optimized Lithium Iron Phosphate for High-Rate Electrochemical Applications
Structural and electrochemical properties of a new highly rechargeable lithium iron phosphate are described here, Its behavior as cathodic material was also tested in a complete power system based onExpand
Divalent Iron Nitridophosphates: A New Class of Cathode Materials for Li-Ion Batteries
L transition metal phosphates, especially olivine LiFePO4, have been found to be promising rechargeable Li-ion battery cathode materials for many applications since they can safely deliver a goodExpand
Facile fabrication of porous NiO films for lithium-ion batteries with high reversibility and rate capability
We report the high-rate capability and good cyclability of three-dimension nanoporous NiO films as the anodes of lithium-ion batteries. The NiO films are fabricated by immersing foam nickelExpand
Fabrication and Electrochemical Characteristics of LiFePO 4 Powders for Lithium-Ion Batteries †
Lithium is an alkali metal with silver-white appearance, soft handle, low density (0.534 g/cm), large specific capacity (3860 Ah/kg), high electrochemical potential, high electro-negativity, and highExpand
Lithium Iron Phosphate: Olivine Material for High Power Li-Ion Batteries
Lithium iron phosphate LiFePO4 (LFP) has been selected as one of the positive electrode material of batteries for electric vehicles (EVs) and hybrid electric vehicles (HEVs), and more generally forExpand
Nano-network electronic conduction in iron and nickel olivine phosphates
The demonstration of non-carbonaceous-network grain-boundary conduction to be the first in these materials, and that it holds promise for other insulating phosphates. Expand
A study on LiFePO4 and its doped derivatives as cathode materials for lithium-ion batteries
Abstract LiFePO 4 , doped LiM x Fe 1− x PO 4 , and Li 1− x M x FePO 4 compounds have been prepared via a sol–gel synthesis method. The physical properties of the as-prepared lithium iron phosphatesExpand
Nanomaterials for Rechargeable Lithium Batteries
Li-Ion batteries are the technology of choice today for high energy density requirements and they are now used for most of the applications, from consumer electronics, power tools to full electricExpand
Rechargeable Lithium Batteries with Electrodes of Small Organic Carbonyl Salts and Advanced Electrolytes
Rechargeable lithium batteries with organic electrode materials are promising energy storage systems with advantages of structural designability, low cost, renewability, and environmentalExpand


Phospho‐olivines as Positive‐Electrode Materials for Rechargeable Lithium Batteries
Reversible extraction of lithium from (triphylite) and insertion of lithium into at 3.5 V vs. lithium at 0.05 mA/cm2 shows this material to be an excellent candidate for the cathode of a low‐power,Expand
Reactivity, stability and electrochemical behavior of lithium iron phosphates
LiFePO4 is a potential cathode candidate for the next generation of secondary lithium batteries. Its reactivity and thermodynamic stability have been determined. At low potentials it can be reducedExpand
Optimized LiFePO4 for Lithium Battery Cathodes
LiFePO 4 powders were synthesized under various conditions and the performance of the cathodes was evaluated using coin cells, The samples were characterized by X-ray diffraction, scanning electronExpand
Approaching Theoretical Capacity of LiFePO4 at Room Temperature at High Rates
Nanocomposites of and conductive carbon were prepared by two different methods which lead to enhanced electrochemical accessibility of the Fe redox centers in this insulating material. Method AExpand
Improved electrochemical performance of a LiFePO4-based composite cathode
Abstract LiFePO4 was synthesized in the presence of high-surface area carbon-black. The carbon was added to the precursors before the formation of the crystalline phase. SEM micrographs confirmedExpand
Issues and challenges facing rechargeable lithium batteries
A brief historical review of the development of lithium-based rechargeable batteries is presented, ongoing research strategies are highlighted, and the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems are discussed. Expand
Modification in the electronic structure of cobalt bronze LixCoO2 and the resulting electrochemical properties
Abstract The paper presents results of an analysis of the electronic conduction and thermoelectric power of the Li x CoO 2 cobalt bronze (0 x ⩽1) resulting from the electrochemical disintercalationExpand
Characterization of oxygen-deficient phases appearing in reduction of the perovskite-type LaNiO3 to La2Ni2O5
Abstract Topotactic vacuum reduction of the perovskite-type LaNiO 3 was performed with aluminum metal powder as a reducing agent. An orthorhombic single phase of oxygen-deficient LaNiO 2.5 + x (0.1 ≤Expand
Li / β ‐ VOPO 4: A New 4 V System for Lithium Batteries
Lithium intercalation into {beta}-VOPO{sub 4} has been performed, both chemically and electrochemically, with X-ray diffraction characterization of the resulting phases at various levels ofExpand
Electrical conduction in olivine
This paper reports detailed measurements of electrical conductivity σ and thermoelectric effect S in the mineral olivine and in synthetic forsterite as functions of temperature in the range fromExpand