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Related Concept Videos

Buffers02:56

Buffers

163.8K
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl...
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Standard Electrode Potentials03:02

Standard Electrode Potentials

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Buffer Effectiveness02:19

Buffer Effectiveness

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Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
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Protein Buffers in Blood Plasma and Cells01:20

Protein Buffers in Blood Plasma and Cells

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The human body utilizes protein buffer systems to maintain a stable pH. These systems capitalize on the dual role of amino acids, which can act as acids or bases by accepting or releasing hydrogen ions in response to pH changes. Protein buffer systems are particularly significant in the extracellular fluid (ECF) and intracellular fluid (ICF) of active cells, where structural and functional proteins provide substantial buffering capacity.
Certain amino acids can exist in a zwitterion state at a...
602
Buffer Systems in the Body01:19

Buffer Systems in the Body

673
Chemical buffers play a critical role in the body's regulation of pH levels. These systems contain one or more compounds that stabilize pH changes by neutralizing strong acids or bases. When pH levels drop, hydrogen ions bind to a weak base; when pH levels rise, hydrogen ions are released. This dynamic process helps maintain pH within a narrow and stable range essential for normal physiological function.
A typical buffer system in bodily fluids includes a weak acid and its corresponding...
673
Buffers: Overview01:30

Buffers: Overview

3.9K
Buffers play a crucial role in stabilizing the pH of a solution by mitigating the effects of small amounts of added acid or base. They consist of a weak acid and its conjugate base or a weak base and its conjugate acid. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl (aq).
3.9K

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Related Experiment Video

Updated: Jun 11, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Bidirectional pH Buffer Effect Facilitates High-Reversible Aqueous Zinc Ion Batteries.

Rongguang Lv1, Zhuo Chen1, Weihua Zhou1

  • 1School of Science, School of Chip Industry, Hubei University of Technology, Wuhan, Hubei, 430068, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 28, 2024
PubMed
Summary

Ammonium salicylate (AS) enhances aqueous zinc ion batteries (AZIBs) by stabilizing the zinc anode and cathode. This electrolyte additive promotes stable cycling and improved performance in energy storage devices.

Keywords:
ammonium salicylateaqueous zinc ion batterybidirectional effectelectrolyte additivepH buffer

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous zinc ion batteries (AZIBs) offer high energy density, safety, and affordability.
  • Key challenges include zinc anode side reactions and cathode dissolution, limiting cycling stability.
  • Developing stable AZIBs is crucial for next-generation energy storage solutions.

Purpose of the Study:

  • To investigate ammonium salicylate (AS) as a bidirectional electrolyte additive for AZIBs.
  • To enhance the cycling stability and electrochemical performance of AZIBs.
  • To elucidate the mechanism of AS in stabilizing zinc anodes and cathodes.

Main Methods:

  • Utilized ammonium salicylate (AS) as an electrolyte additive in AZIBs.
  • Investigated the stabilization of pH at the electrolyte/electrode interface.
  • Analyzed the deposition behavior of Zn2+ ions and electrode material stability.

Main Results:

  • AS additive guided homogeneous Zn2+ deposition and mitigated anode side reactions.
  • NH4+ ions adsorbed on both anode and cathode surfaces, enhancing electrode stability.
  • Zn//Zn symmetric cells demonstrated 700 hours of stable cycling at 5 mA cm-2.
  • Full cells (NH4V4O10//Zn) exhibited improved capacity and cycle life with AS.

Conclusions:

  • Ammonium salicylate effectively stabilizes AZIBs by controlling zinc deposition and preserving electrode integrity.
  • The synergistic action of NH4+ and C6H4OHCOO- ions is key to improved battery performance.
  • AS is a practical and effective additive for developing high-performance and long-lasting AZIBs.