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Common Ion Effect03:24

Common Ion Effect

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Precipitation of Ions03:11

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Predicting Precipitation
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The Carbon Cycle01:14

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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Storage01:23

Storage

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Ions as Acids and Bases02:54

Ions as Acids and Bases

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Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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Formation of Complex Ions03:45

Formation of Complex Ions

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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...
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Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
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A Functionalized Carbon Surface for High-Performance Sodium-Ion Storage.

Qiaowei Lin1, Jun Zhang2, Wei Lv1

  • 1Shenzhen Geim Graphene Center, Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 8, 2019
PubMed
Summary
This summary is machine-generated.

Surface functionalization of carbon materials enhances sodium-ion battery performance. Strategies like heteroatom doping and defect shielding improve capacity and efficiency for large-scale energy storage.

Keywords:
carbon materialsfunctional groupsheteroatom dopingsodium-ion batteriessurface chemistry

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sodium-ion batteries (SIBs) are crucial for large-scale energy storage.
  • Carbon materials are prime candidates for SIB electrodes.
  • Defects in carbon materials are key for sodium storage, but capacity and efficiency require improvement.

Purpose of the Study:

  • To review recent advances in surface functionalization of carbon materials for SIBs.
  • To discuss the impact of functionalization on material properties.
  • To identify challenges and future research directions.

Main Methods:

  • Categorization of functionalization strategies: heteroatom doping, functional group grafting, defect shielding.
  • Analysis of structural changes induced by surface modification.
  • Review of recent progress in producing functionalized carbon materials.

Main Results:

  • Heteroatom doping enhances electrochemical reactivity.
  • Functional group grafting boosts both diffusion-controlled and capacitive processes.
  • Defect shielding improves efficiency and stability without reducing capacity.

Conclusions:

  • Surface functionalization is a direct and feasible method to enhance SIB performance.
  • Tailoring carbon material surfaces offers significant potential for advanced energy storage.
  • Further research is needed to overcome existing challenges and unlock full potential.