50
100150Energy density (W h kg -1)
Lighter weight
Lead–acid
200
250
Ni–Cd
Ni–MH
Li ion
六字网名
Li metal ('unsafe')
PLiON
S m a l l e r s i z e
Comparison of the different battery technologies in terms of volumetric and gravimetric energy density. The share of worldwide sales for Ni–Cd, Ni–MeH and Li-ion portable batteries is 23, 14 and 63%, respectively. The u of Pb–acid batteries is restricted mainly to SLI (starting, lighting, ignition) in automobiles or standby applications, whereas Ni–Cd batteries remain the most suitable technologies for high-power applications (for example, power tools ).
Non-aqueous liquid electrolyte
Positive (Li x Host 1)
Li +
Li ++
Non-aqueous liquid electrolyte
Positive (Li x Host 1)高三励志名言
(Lithium)
Li +
Li +
+
三不动火After 100 cycles
a
-Metal oxides
Capacity (A h kg -1)
1000
400爱情诗集
600800
Nitrides LiM y N 2
水字笔顺
Positive material:
四年级下册人教版of Li ion of Li metal
( limited cycling)Negative material:
© 2001 Macmillan Magazines Ltd
solubility of the resulting thiolates in the electrolyte, leading to lf discharge.
Materials for negative electrodes
As a result of numerous chemical (pyrolitic processing) or physical (mechanical milling) modifications, carbon negative electrodes display electrochemical performances that are improving continu-ously. Reversible capacities of around 450 mA h g reached, compared with a practical value of 350 mA h g (372 mA h g rearch efforts are focud on arching for carbon alternatives in the hope of finding materials (Fig. 4) with both larger capacities and slightly more positive intercalation voltages compared to Li/Li to minimize any risks of high-surface-area Li plating at the end of fast recharge, which are associated with sulted in the emergence of Li transition-metal nitrides as a new potential class of anode materials reversible capacity (600 mA h g NATURE |VOL 4
14|15 NOVEMBER 2001|
363
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锐角三角形图片
表达谦虚的成语C + (mA h)C – (mA h)
