Zinc ash in steel industry,spent batteries,worn electrical devices,printing circuitry boards,copper smelt residues and electroplating sludge are key issues in recycling utilization of m.

Characteristics of electrosynthesized polyaniline were mea-sured with the potential sweep methods, effects of pH on conductivity ofpolyaniline have been studied,polyaniline was used as positive electrodeactive materials of polyaniline-lead secondary battery,charge/dischargebehavior of polyaniline-lead secondary battery and conlomb efficiencyhave been investigated.

The principle to select primary battery or secondary battery was demon.

For example, the mobile phone user increased to almost 335 million, led the development of small size secondary battery; the development of household mini digital electrical equipment products enhanced heavy load and high power discharge performance of primary battery.

Test and separation system for rechargeable battery based on network platform;

Cycle life detector for rechargeable battery;

Nano-TiO 2/polyaniline was used as a positive electrode active material for Zn│Nano-TiO 2-PANI rechargeable battery.

Introduced uncertainty projects about dimensions, open-circuit voltage, on-load voltage and service output of primary batteries and secondary batteries.