Related Experiment Video
Updated: Mar 24, 2026
11:25
In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
16.4K
Li(V0.5Ti0.5)S2 as a 1 V lithium intercalation electrode
Steve J Clark1, Da Wang1, A Robert Armstrong2
1Departments of Materials and Chemistry, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
Nature Communications
|March 22, 2016
Summary
Researchers developed a novel 1 V anode material, Li(V0.5Ti0.5)S2, for safer lithium-ion batteries. This new sulfide material offers high capacity and excellent rate capability, surpassing existing 1 V anode options.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Graphite anodes in lithium-ion batteries operate at low voltage (0.1 V vs Li+/Li), risking lithium plating and safety issues.
- Titanate anodes (e.g., Li4Ti5O12) operate at higher voltages (1.6 V vs Li+/Li) to prevent plating but reduce cell voltage.
- There is a need for 1 V anode materials that balance plating prevention with minimal voltage reduction.
Purpose of the Study:
- To investigate LiVS2 and LiTiS2 as 1 V intercalation electrodes.
- To develop and characterize a new 1 V anode material, Li1+x(V0.5Ti0.5)S2, for improved lithium-ion battery performance.
Main Methods:
- Synthesis and electrochemical characterization of the Li1+x(V0.5Ti0.5)S2 solid solution.
- Testing of electrochemical performance, including reversible capacity, rate capability, and polarization.
Main Results:
- The Li1+x(V0.5Ti0.5)S2 solid solution delivered a reversible capacity of 220 mAhg(-1) at 0.9 V (99% of theoretical) at a C/2 rate.
- Excellent rate capability was observed, with 200 mAhg(-1) at a 3C rate.
- Low polarization (100 mV at C/2) and high capacity retention (205 mAhg(-1) at C-rate) were achieved.
Conclusions:
- Li1+x(V0.5Ti0.5)S2 demonstrates superior properties compared to previously reported 1 V anode materials.
- This material offers a promising solution for safer lithium-ion batteries by operating at a voltage that avoids lithium plating.
- The high capacity, excellent rate capability, and low polarization make Li1+x(V0.5Ti0.5)S2 a strong candidate for next-generation energy storage.
Related Concept Videos
02:47Voltaic/Galvanic Cells
68.0K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
68.0K
02:48Ionic Bonding and Electron Transfer
53.7K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
53.7K
01:30The Electrical Double Layer
117
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
117
04:02Weak Acid Solutions
45.0K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
45.0K
03:45Formation of Complex Ions
26.7K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.7K
03:12Batteries and Fuel Cells
31.9K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
31.9K