Plating metal negative electrodes under protective coatings.

在保护层下的电镀金属负电极。

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By directly measuring the exchange current density, the effect of surface copper coating of metal negative electrodes on electrocatalytic activity were investigated.

摘要通过测量表面覆铜的贮氢合金电极的交换电流密度，初步讨论了覆铜层对贮氢合金的电催化活性的影响。

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Similarly, in an ultracapacitor, when voltage is applied across the two metal plates (i.e. during charging), a charge still builds on the two electrodes—one positive, one negative.

同样，在超级电容中，当两块金属片被施以电压（即充电）后，电荷建立于两极，一极为正，一极为负。

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Silver prices remain volatile, but the tone toward the metal remains negative, especially as recent economic data suggests a possible slowing of industrial demand.

FORBES: METALS OUTLOOK: Mixed Outlook For Gold Next Week

Metal industries report negative growth expectations for everything except new graduate hiring, which is expecting a moderate budgetary increase.

FORBES: 2013 R&D Spending Outlook: Mildly Optimistic and Stable

No one would ever redeem the silver certificates for the metal because of this negative difference between the face value and melt value.

FORBES: A Gold Standard Is Big Oil's Best Defense Against Political Attack