Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Bourns Releases Two High Current Common Mode Choke Models

    Electronics Weekly Announcing Finalists for Elektra Awards 2025

    Exxelia Exhibit at Electronica India September 17–19, 2025

    Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

    VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

    SCHURTER Releases High Performance EV-Fuse

    Panasonic Industry to Double Production of MEGTRON PCB Materials

    5th PCNS Awards Outstanding Passive Component Papers

    TDK Releases Ultra-small PFC Capacitors

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Switched Capacitor Converter Explained

    Understanding Inductor Dot Markings and Their Application in LTspice

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Bourns Releases Two High Current Common Mode Choke Models

    Electronics Weekly Announcing Finalists for Elektra Awards 2025

    Exxelia Exhibit at Electronica India September 17–19, 2025

    Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

    VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

    SCHURTER Releases High Performance EV-Fuse

    Panasonic Industry to Double Production of MEGTRON PCB Materials

    5th PCNS Awards Outstanding Passive Component Papers

    TDK Releases Ultra-small PFC Capacitors

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Switched Capacitor Converter Explained

    Understanding Inductor Dot Markings and Their Application in LTspice

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Dead leaves used to produce supercapacitors

1.9.2017
Reading Time: 2 mins read
A A

source: bioenergy news

Researchers in China have developed a new process to turn fallen leaves into a capacitor which could be used to store energy in electronic devices.

RelatedPosts

Bourns Releases Two High Current Common Mode Choke Models

Electronics Weekly Announcing Finalists for Elektra Awards 2025

Exxelia Exhibit at Electronica India September 17–19, 2025

Deciduous phoenix trees lining the roadside of Northern China produce a blanket of fallen leaves every autumn. Generally, these leaves are burnt as the temperatures drop, contributing to China’s air pollution problem. Now, researchers from Shandong have discovered a method to convert this organic biomass into a porous carbon material that can be used in high tech electronics.

The ‘simple’, multistep process sees the dried leaves ground into a powder and heated to 220 degrees Celsius for 12 hours. This results in a powder consisting of tiny carbon microspheres which are then treated with a solution of potassium hydroxide and heated by increasing the temperature in a series of ‘jumps’ from 450 to 800 degrees.

During the chemical treatment the surfaces of the carbon microspheres are corroded, making them extremely porous. The final product, a black carbon powder, has a very high surface area due to the presence of many tiny pores that have been chemically etched on the surface of the microspheres. The high surface area gives the final product its extraordinary electrical properties.

Supercapacitor potential

Led by Hongfang Ma of Qilu University of Technology, the researchers then ran a series of standard electrochemical tests on the porous microspheres to determine their potential for use in electronic devices. The current-voltage curves for these materials indicate that the substance would make an ‘excellent’ capacitor. In fact, their specific capacitances of 367 Farads/gram are over three times higher than values seen in some graphene capacitors, putting the material in the range of a supercapacitor.

Capacitors are widely used electrical components that store energy by holding a charge on two conductors, separated by an insulator. Supercapacitors generally store 10 – 100 times as much energy as typical capacitors, meaning they can charge faster than typical rechargeable batteries. For this reason they are seen to hold great promise for the development of computers and hybrid electric vehicles.

Hongfang Ma’s team’s research also saw them successfully convert other biowastes, such as potato waste, corn straw, pine wood and rice straw, into carbon electrodes. Overall, the supercapacitive properties of the porous carbon microspheres made from phoenix tree leaves are higher than those reported for carbon powders derived from other biowaste materials.

 

featured image: Scanning Electron Microscopy (SEM) image of porous carbon microspheres. Credit: Hongfang Ma, Qilu University of Technology

Related

Recent Posts

Electronics Weekly Announcing Finalists for Elektra Awards 2025

16.9.2025
2

Exxelia Exhibit at Electronica India September 17–19, 2025

15.9.2025
17

Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

15.9.2025
8

VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

15.9.2025
7

5th PCNS Awards Outstanding Passive Component Papers

14.9.2025
26

TDK Releases Ultra-small PFC Capacitors

10.9.2025
31

KYOCERA AVX Releases Novel Mini BME Stacked Ceramic Capacitors

10.9.2025
25

Vishay Releases Class 1 Leaded High Voltage Ceramic Disc Capacitors

10.9.2025
17

TDK Releases 140C Compact Vibration Robust Automotive Aluminum Capacitors

5.9.2025
30

Samsung MLCCs Lineup for In-Vehicle Infotainment

4.9.2025
33

Upcoming Events

Sep 16
17:00 - 18:00 CEST

EMI Shielding Challenges

Sep 16
20:00 - 21:00 CEST

Reduce SMT Parasitic Design Failures with Innovative Filter Topologies

Sep 22
September 22 @ 13:00 - September 25 @ 15:15 EDT

Pre Cap Visual Inspection per Mil-Std-883 (TM 2017)

Sep 30
September 30 @ 12:00 - October 2 @ 14:00 EDT

MIL-Std-883 TM 2010

Oct 17
12:00 - 14:00 EDT

External Visual Inspection per MIL-STD-883 TM 2009

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • How to Design an Inductor

    0 shares
    Share 0 Tweet 0
  • Core Materials, Permeability and Their Losses

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version