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Related Concept Videos

Introduction to Chemical Reactions01:23

Introduction to Chemical Reactions

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All chemical reactions begin with a reactant, the general term for one or more substances entering the reaction. Sodium and chloride ions, for example, are the reactants in the production of table salt. One or more substances produced by a chemical reaction are called the product. Chemical reactions follow the law of conservation of mass, which means that matter cannot be created nor destroyed in a chemical reaction. The components of the reactants—the number of atoms and the...
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Reaction Mechanisms03:06

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Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:
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Predicting Reaction Outcomes02:24

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Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
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Reversible and Irreversible Processes01:14

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The thermodynamic processes can be classified into reversible and irreversible processes. The processes that can be restored to their initial state are called reversible processes. It is only possible if the process is in quasi-static equilibrium, i.e., it takes place in infinitesimally small steps, and the system remains at equilibrium However, these are ideal processes and do not occur naturally. An ideal system undergoing a reversible process is always in thermodynamic equilibrium within...
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The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
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A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
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Working at room temperature.

Dejian Dong1, Yi-Chun Lu1

  • 1Electrochemical Energy and Interfaces Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China.

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Summary
This summary is machine-generated.

A new solid-state electrolyte allows lithium-air batteries to function at room temperature (25°C). This breakthrough advances the development of efficient and stable energy storage solutions.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-air batteries offer high theoretical energy density.
  • Conventional lithium-air batteries require elevated temperatures or humid conditions.
  • Solid-state electrolytes are crucial for battery safety and stability.

Purpose of the Study:

  • To develop a solid-state electrolyte for lithium-air battery operation at ambient temperature.
  • To demonstrate the feasibility of room-temperature operation for lithium-air batteries.

Main Methods:

  • Synthesis and characterization of a novel solid-state electrolyte material.
  • Assembly and testing of a lithium-air battery utilizing the developed electrolyte.
  • Electrochemical performance evaluation at 25°C.

Main Results:

  • The solid-state electrolyte enabled stable lithium-air battery operation at 25°C.
  • The battery demonstrated promising cycling performance and coulombic efficiency at room temperature.

Conclusions:

  • Solid-state electrolytes can facilitate practical room-temperature operation of lithium-air batteries.
  • This work paves the way for next-generation, high-performance batteries.