Nowadays people are more catered to fast food culture. Fast charge is becoming more demanding, and people now are increasingly willing to buy a cell phone that supports fast charge.
Some popular fast chargers such as Quick Charge 2.0 and 3.0 produced by Qualcomm, Pump Express of Media Tek. Inc, and OPPO VOOC is helpful in our daily life. Question is that whether fast charging has the negative impact on battery? And the answer is yes.
What is a Lithium-ion Battery?Alithium-ion battery (sometimes Li-ion battery or LIB) is a member of the family of rechargeable battery types. The lithium ions move from the negative electrode to the positive electrode during discharge and back when charging. Li-ion batteries use an intercalated lithium compound as one electrode material, comparably, the metallic lithium, which is used in a non-rechargeable lithium battery. The electrolyte allows ionic movement. And the two electrodes are the constituent components of a lithium-ion battery cell.
The negative electrode is generally made from carbon (graphite) and the electrolyte varies from one type of battery to another. The positive electrode is typically made from a chemical compound called lithium-cobalt oxide (LiCoO2) or, in newer batteries, from lithium iron phosphate (LiFePO4).
How Does a Lithium-ion Battery Work?All lithium-ion batteries work in broadly the same way. When the battery is charging up, the lithium-cobalt oxide, positive electrode gives up some of its lithium ions, which move through the electrolyte to the negative, graphite electrode and remain there. The battery takes in and stores energy during this process. When the battery is discharging, the lithium ions move back across the electrolyte to the positive electrode, producing the energy that powers the battery. In both cases, electrons flow in the opposite direction to the ions around the outer circuit. Electrons do not flow through the electrolyte: it's effectively an insulating barrier, so far as electrons are concerned.
The movement of ions (through the electrolyte) and electrons (around the external circuit, in the opposite direction) are interconnected processes, and if either stops so does the other. If ions stop moving through the electrolyte because the battery completely discharges, electrons can't move through the outer circuit either—so you lose your power. Similarly, if you switch off whatever the battery is powering, the flow of electrons stops and so does the flow of ions. The battery essentially stops discharging at a high rate (but it does keep on discharging, at a very slow rate, even with the appliance disconnected).
Ideally, a long-run cycling requires chemical constitution of both positive electrode and negative electrode remain unchanged condition. Fast charge works mainly because it prevents the deposition of Lithium ions and allows ions to shuttle rapidly. However, when the current increases, the SEI layer on graphite breaks so that electrodes and electrolyte will interact. Besides, when temperature rises, chemical substances inside of the cell will be damaged by the reaction generated inside. Both situations will degrade the process of ions moving between two electrodes. Thus, we have to notice that the power is consuming faster and faster even when fully charged.
Generally speaking, fast charge causes the 500 rated battery reduced in its lifespan to less than 500 cycles.
However, the degradation of battery doesn't matter a lot if you don't use a phone for many years, or if you are willing to change for another new battery.
If you plan to use your phone more then 2 years.do use a phone for 2 or more years, these tips are for you.
• Use fast charge only when it is necessary.
• Charge your cellphone when the battery is under 30% rather than 3%.
• Don't play games while your phone is charging.
I wonder, between the convenience of faster charge rate with less lifespan and longer lifespan but slower charging rate, which one you prefer? Share with us about your thoughts.