Bonding wooden frames. Drawing, description

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Bonding wooden frames. Tips for the home master

Builder, home master

An ordinary stick and rope will come in handy when gluing wooden frames.

A rope loop is thrown at each of the corners, which are then connected in the center, where their final tightness is created by rotating a short stick or plank, as is done on a bow saw.

Gluing wooden frames

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Aluminum batteries are better than lithium-ion 12.10.2019

Physicists claim that batteries based on aluminum ions are much more efficient and environmentally friendly than lithium batteries that are popular today.

Progress cannot be stopped, and today we all depend on batteries, whether we like it or not. Everything from smartphones to cars requires a battery to run. However, modern lithium-ion batteries have a number of obvious disadvantages. A new study has shown that a modernized type of aluminum battery is far superior to the current standard.

The main advantage of aluminum batteries is the relatively low production costs and the use of materials that are abundant on our planet and are readily available. This means that a person does not have to destroy entire ecosystems and spend huge resources in order to obtain materials for their manufacture. First of all, this concept is suitable for large-scale energy systems - for example, for areas where it is possible to extract energy from renewable sources and it needs to be stored somewhere.

In addition to the shortage of lithium, manufacturers of classic lithium-ion batteries also face the problem of using cobalt, a metal potentially hazardous to humans. If industrialists succeed in switching to aluminum, then we will become noticeably less dependent on fossil fuels, and the process of manufacturing and recycling batteries will be noticeably simplified.

Physicist Patrik Johansson of Chalmers University of Technology in Sweden also noted that the new type of battery also has twice the energy capacity of aluminum batteries already on the market. The concept itself is not innovative, but if earlier graphite was used as a cathode, now it has been replaced by anthraquinone.

This invention has room for improvement. This is especially true of the electrolyte - a chemical mixture that stimulates the movement of ions between the cathode and anode. Aluminum is, in principle, a better charge carrier than lithium, Johanson says, because it is multivalent and "each ion compensates for a few electrons."

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