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[Tempatan]
{11}Power bank pelajar MRSM memang power: Menang anugerah Geneva!
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Juli Jalaludin la, Ngucing. Curious, mana dia sekarang? Semoga dia kembali ke jalan yang benar, Allah bagi kesedaran dan keinsafan. Amin.
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Emmet, try to ask you best friend Mr. Google. Ngucing salah nama tu, 'jala' bukan 'jama'.
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aku rasa dia dah sedar dah tu 
elok la dia dgn kepercayaannya
cuma tak eloknya dia pegi kutuk islam balik, hmmm...
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tahniah dik. sungguh mendunia kejayaan itu.
masuk u nanti buat projek untuk wireless powerbank pula. innovate product yang sedia ada |
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betol ker nih????????mesia penah ade kaitan ngan elektronik??
derang buat ape mase tu,packing kapacitor ker??
pnah bace,jepun cetak rompak transistor daripada american tahun 60an selama 30 dekad,tanpa hulur sesen pun...............that american mcam di ban/shutup mase smpai kat jepun
tahun 90 an camtu ker,bile transistor x dek makne dah,baru jepun ngaku................huhuhuhu
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Rambo bangga dgn adik adik ni . Sebab Rambo pn dulu EX MRSM Serting batch 1998 . Hidup MRSM !!
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hahahaha...menusuk kolbu tuh...
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negeri2 dari kelantan , ganu, selangor melaka n penang mmg terkenal sebagai negeri rakyatnya bijak dan pandai
tgk result spm ka pt3 ikut negeri pon mmg negeri2 ni yg top
negeri yg bodoh cam johor |
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Bagus adik2 ni dan cikgu mereka juga |
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these malay boys are copycats ! they just copy the whole idea from Youtube and later claim it is Malay boys invention .... what a crap ... they want to patent it? crap ... lies |
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The aluminium-ion battery offers tantalising solutions to problems with lithium-ion ones. Aluminium, being the most abundant metal in the Earth's crust, is much cheaper than lithium and is also much less reactive so battery fires are unlikely to be a problem. Ionising aluminium also liberates three electrons compared with lithium's one, potentially giving the batteries a higher charge capacity. But aluminium-ion batteries have been plagued by numerous difficulties: the discharge voltages have often been as low as 0.55V and various cathodes trialled have disintegrated during repeated cycling, causing the lifetimes of the batteries of the batteries to drop to 85% or less within 100 cycles.
But now Hongjie Dai and colleagues at Stanford University in California unveil a prototype battery with a new graphite cathode that solves these problems. The group's discovery of the remarkable properties of graphite began with a stroke of luck. While investigating the potential of metal oxide films as cathodes, the researchers used graphite particles to increase their conductivity. When the composite films showed battery like behaviour, they decided to investigate further. In the Stanford team's aluminium-ion battery, aluminium chloride ions (AlCl4-) are stored at the cathode when the battery is charged. On discharge, the ions migrate to the anode where they combine with metallic aluminium to form Al2Cl7-. When the researchers investigated the graphite cathode’s chemistry they discovered that AlCl4- anions reversibly intercalate between the graphite layers.
http://www.rsc.org/chemistryworl ... -ready-take-lithium
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