中文摘要：

二种多孔的硅(PS ) 被从米饭外壳(RH ) 的氧化导出的米饭外壳硅石(RHS ) 的 magnesiothermic 减小综合。一个人在 500 点从氧化 / 减小被获得 ? 湯琠敨攠敬瑣潲档浥捩污瀠牥潦浲湡散漠 ? 潰潲獵猠汩捩湯猠湹桴獥穩摥映潲 ? 慭湧獥潩桴牥業? 敲畤瑣潩 ?景戠潩楳楬 吗？

英文摘要：

Two kinds of porous silicon（PS） were synthesized by magnesiothermic reduction of rice husk silica（RHS） derived from the oxidization of rice husks（RHs）. One was obtained from oxidization/reduction at 500 ℃ of the unleached RHs, the other was synthesized from oxidization/reduction at 650 ℃ of the acidleached RHs. The structural difference of the above PS was compared： the former had a high pore volume（PV, 0.31 cm3/g） and a large specific surface area（SSA, 45.2 m~2/g）, 138 % and 17 % higher than the latter, respectively. As anode materials for lithium ion batteries, the former had reversible capacity of 1 400.7 m Ah/g, 987 m Ah/g lower than the latter; however, after 50 cycles, the former had 64.5 % capacity retention（907 m Ah/g）, which was 41.2 % higher than the latter（555.7 m Ah/g）. These results showed that the electrochemical performance of PS was significantly affected by its pore structures, and low reduction temperature played the key role in increasing its porosity, and therefore improving its cycling performance.