Related Experiment Video
Updated: Jun 6, 2025
09:43
Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores
Published on: October 31, 2013
13.4K
Ultrahigh Plateau-Capacity Sodium Storage by Plugging Open Pores
Jiao Peng1, Huanwen Wang1, Xiaojun Shi1
1Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.
Advanced Materials (Deerfield Beach, Fla.)
|November 28, 2024
Summary
This study introduces a novel hard carbon anode for sodium-ion batteries, synthesized using banana peel waste. The innovative structure enhances sodium storage capacity, offering a more energy-efficient production method.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Hard carbon (HC) is a key anode material for sodium-ion batteries (SIBs).
- Optimizing pore structure is crucial for high plateau-capacity in HC anodes.
- Biomass-derived activated carbon (AC) offers a sustainable precursor for carbon materials.
Purpose of the Study:
- To develop a composite hard carbon anode by integrating graphitic carbon with biomass-derived AC.
- To precisely modulate the pore structure of HC for enhanced sodium storage.
- To achieve high reversible sodium-storage capacity and understand the storage mechanism.
Main Methods:
- Composite HC synthesis by integrating graphitic carbon with banana peel-derived AC.
- Nitrogen doping to form pseudographitic layers at pore entrances.
- Electrochemical characterization to evaluate sodium storage performance.
- In situ Raman spectroscopy to investigate the sodium storage mechanism.
Main Results:
- Reduced surface area of AC (by 170 times) and conversion of open pores to closed pores.
- Achieved a reversible sodium-storage capacity of up to 524 mAh g⁻¹.
- A significant portion of capacity (490 mAh g⁻¹) attributed to pore-filling mechanism below 0.25 V.
- Energy-efficient synthesis at 900 °C compared to traditional methods.
Conclusions:
- A straightforward method for modulating carbon material pore structure is presented.
- The developed HC anode demonstrates excellent sodium storage performance.
- This approach offers a sustainable and energy-efficient route for producing advanced SIB anode materials.
More Related Videos
Related Concept Videos
01:26Reabsorption and Secretion in the DCT and Collecting Duct
923
The early phase of the DCT manages the reabsorption of approximately 10-15% of filtered water, 5–10% of filtered sodium, and 5–10% of filtered chloride. This process is facilitated by Na+–Cl− symporters in apical membranes and sodium-potassium pumps, as well as Cl− leakage channels in basolateral membranes. The early DCT also stands out as a site where parathyroid hormone (PTH) stimulates calcium reabsorption, depending on the body's requirements.
The distal...
The distal...
923
01:17Reabsorption and Secretion in the Loop of Henle
1.0K
The thick ascending limb of the nephron loop has Na+–K+–2Cl− symporters in the apical membranes of its cells. These symporters simultaneously reclaim one sodium ion, one potassium ion, and two chloride ions from the tubular fluid. Sodium ions are actively transported into the interstitial fluid at the base and sides of the cell, diffusing into the vasa recta. Chloride ions move through leakage channels in the basolateral membrane into the interstitial fluid and then into the...
1.0K
01:23Formation of Concentrated Urine
1.5K
There is a gradient of solutes in the interstitial fluid from the renal cortex through the medulla, known as the medullary osmotic gradient. The juxtamedullary nephrons establish and maintain this gradient using countercurrent mechanisms with loops extending deep into the medulla. These nephrons also use countercurrent mechanisms to regulate urine volume and concentration. The interaction between the descending and ascending limbs of the nephron loop creates an osmotic gradient through...
1.5K
01:17Pore Transport and Ion-Pair Transport
368
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
368
01:20Formation of Dilute Urine
1.4K
The formation of dilute urine is a critical renal adaptation that maintains fluid balance, particularly during periods of high fluid intake. This process primarily involves the juxtamedullary nephrons. By adjusting the permeability of water and ions in response to physiological conditions, the kidneys can either conserve or excrete water, resulting in concentrated or dilute urine.
Filtrate Osmolarity in the PCT
Initially, as the filtrate passes through the proximal convoluted tubule (PCT), its...
Filtrate Osmolarity in the PCT
Initially, as the filtrate passes through the proximal convoluted tubule (PCT), its...
1.4K
02:02Responses to Salt Stress
13.0K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.0K