CN104851608A - 一种秸秆基纳米炭复合电极材料及其制备方法 - Google Patents
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Abstract
本发明公开了一种秸秆基纳米炭复合电极材料,其特征在于,由下列重量份的原料制成:改性秸秆复合材料140-150、五氧化二锑2-3、聚亚胺3-4、羧甲基纤维素1-2、丁苯橡胶1-2、氢氧化镧2-3、超细硼粉2-3、乙酸钴1-2、偏钒酸铵1-2、去离子水适量;本发明通过对作物秸秆炭化、活化和掺杂改性,制备出高活性、高比表面积的炭,并且添加的其他导电物质,增大了比电容,提高了导电性能,其中成本低廉,来源广泛,适合工业化生产。
Description
技术领域
本发明涉及化学能源材料领域,特别是一种秸秆基纳米炭复合电极材料及其制备方法。
背景技术
超级电容器是一种新型储能装置,集高能量密度、高功率密度、长寿命(数十万次以上)等特性于一身,此外它还具有容量大、内阻小、充放电速度快、工作温度范围宽(-40℃~65℃)、免维护、可靠性高等优点,在新能源(风能和太阳能)、通讯、数码电子、电力、汽车、工程机械、军事及航空航天等领域都有十分广泛的应用。电极是超级电容器的核心组成部分,由活性物质层与集流体组成,其性能好坏对超级电容器的容量、内阻等具有关键性的影响。通常,超级电容器的电极制作工艺采用浆料涂布工艺,即在集流体上涂覆活性材料、导电剂与粘结剂的混合浆料,再经干燥、辊压得到活性炭电极。
我国是农业大国,伴随着各种农作物成熟后秸秆产量更是多达7亿多吨,除去将其用作燃料、建筑材料、饲料和肥料以及发电外,仍有60%的无法有效利用而遭废弃,不仅造成了大量的生物质能源浪费,也对环境造成了一定的影响。所以本发明利用农作物秸秆进行炭化、活化等步骤制成活性炭,作为电极的材料,添加的其他导电物质,增大了比电容,提高了导电性能,其中成本低廉,来源广泛,适合工业化生产。
发明内容
本发明的目的是提供一种秸秆基纳米炭复合电极材料及其制备方法。
为了实现本发明的目的,本发明通过以下方案实施:
一种秸秆基纳米炭复合电极材料,由下列重量份的原料制成:改性秸秆复合材料140-150、五氧化二锑2-3、聚亚胺3-4、羧甲基纤维素1-2、丁苯橡胶1-2、氢氧化镧2-3、超细硼粉2-3、乙酸钴1-2、偏钒酸铵1-2、去离子水适量;
所述改性秸秆复合材料是由下列重量份的原料制成:秸秆100-120、稀盐酸溶液30-50、氯化锌30-50、甲基三乙氧基硅烷1-2、钛酸锰1-2、导电炭黑2-4、石墨烯2-4、煅烧高岭土15-25、过硫酸钾0.5-0.8、超细玻璃纤维0.5-1;制备方法是(1)将秸秆粉碎成8-20目,用水清洗干净后在100-120°C下干燥至恒重;(2)将秸秆原料与60%的氯化锌按照1:2-3的配比混合,搅拌均匀,浸渍24小时后放入马弗炉中,在600-700°C温度下活化1小时,然后经水洗、过滤、干燥得到活性炭备用;(3)将煅烧高岭土和活性炭加到稀盐酸溶液中,于室温下浸泡8-12小时,过滤,固体用蒸馏水洗涤至中性,滤液无氯离子检出,真空干燥后研磨粉碎过200-300目筛;(4)将步骤(3)的产物和蒸馏水按照粉体重量:0.1:30-50的比例混合均匀,加热至40-50°C,加入过硫酸钾、甲基三乙氧基硅烷,搅拌均匀,再加入其余剩余物质搅拌3-5小时,反应结束后经抽滤、干燥制得改性秸秆复合材料。
本发明所述一种秸秆基纳米炭复合电极材料,由以下具体的步骤制成:将羧甲基纤维素、丁苯橡胶加到去离子水中,高速搅拌形成粘稠的液体,再加入称量好的五氧化二锑、聚亚胺、氢氧化镧、超细硼粉、乙酸钴、偏钒酸铵充分搅拌0.5-1小时,再加入改性秸秆复合材料先高速搅拌1-2小时,再转移到胶磨机中低速研磨得到200-400目的浆料,再将浆料均匀的涂布在集流体上,在温度100-110°C下真空干燥8-12小时,取出后在10MPa的压力下进行压片,裁剪后再次放入真空干燥箱内90-100°C温度下烘干至恒重即可。
本发明的优点是:本发明通过对作物秸秆炭化、活化和掺杂改性,制备出高活性、高比表面积的炭,并且添加的其他导电物质,增大了比电容,提高了导电性能,其中成本低廉,来源广泛,适合工业化生产。
具体实施方案
下面通过具体实例对本发明进行详细说明。
一种秸秆基纳米炭复合电极材料,由下列重量份(公斤)的原料制成:改性秸秆复合材料140、五氧化二锑2、聚亚胺4、羧甲基纤维素1、丁苯橡胶2、氢氧化镧3、超细硼粉2、乙酸钴1、偏钒酸铵1、去离子水适量;
所述改性秸秆复合材料是由下列重量份(公斤)的原料制成:秸秆100、稀盐酸溶液39、氯化锌35、甲基三乙氧基硅烷1、钛酸锰2、导电炭黑4、石墨烯3、煅烧高岭土20、过硫酸钾0.7、超细玻璃纤维0.8;制备方法是(1)将秸秆粉碎成8-20目,用水清洗干净后在100-120°C下干燥至恒重;(2)将秸秆原料与60%的氯化锌按照1:2-3的配比混合,搅拌均匀,浸渍24小时后放入马弗炉中,在600-700°C温度下活化1小时,然后经水洗、过滤、干燥得到活性炭备用;(3)将煅烧高岭土和活性炭加到稀盐酸溶液中,于室温下浸泡8-12小时,过滤,固体用蒸馏水洗涤至中性,滤液无氯离子检出,真空干燥后研磨粉碎过200-300目筛;(4)将步骤(3)的产物和蒸馏水按照粉体重量:0.1:30-50的比例混合均匀,加热至40-50°C,加入过硫酸钾、甲基三乙氧基硅烷,搅拌均匀,再加入其余剩余物质搅拌3-5小时,反应结束后经抽滤、干燥制得改性秸秆复合材料。
本发明所述一种秸秆基纳米炭复合电极材料,由以下具体的步骤制成:将羧甲基纤维素、丁苯橡胶加到去离子水中,高速搅拌形成粘稠的液体,再加入称量好的五氧化二锑、聚亚胺、氢氧化镧、超细硼粉、乙酸钴、偏钒酸铵充分搅拌0.5-1小时,再加入改性秸秆复合材料先高速搅拌1-2小时,再转移到胶磨机中低速研磨得到200-400目的浆料,再将浆料均匀的涂布在集流体上,在温度100-110°C下真空干燥8-12小时,取出后在10MPa的压力下进行压片,裁剪后再次放入真空干燥箱内90-100°C温度下烘干至恒重即可。
以所述实施例中制备的电极为工作电极,铝箔为集电极,聚四氟乙烯为隔膜,1.0M三乙基甲基铵四氟硼酸盐的乙腈溶液为电解液,在1.2-2.5V的范围内,在恒流(5mA)下进行循环测试,容量:1.62F,内阻:1.8Ω·m,循环容量保持率(%):98.0。
Claims (2)
1.一种秸秆基纳米炭复合电极材料,其特征在于,由下列重量份的原料制成:改性秸秆复合材料140-150、五氧化二锑2-3、聚亚胺3-4、羧甲基纤维素1-2、丁苯橡胶1-2、氢氧化镧2-3、超细硼粉2-3、乙酸钴1-2、偏钒酸铵1-2、去离子水适量;
所述改性秸秆复合材料是由下列重量份的原料制成:秸秆100-120、稀盐酸溶液30-50、氯化锌30-50、甲基三乙氧基硅烷1-2、钛酸锰1-2、导电炭黑2-4、石墨烯2-4、煅烧高岭土15-25、过硫酸钾0.5-0.8、超细玻璃纤维0.5-1;制备方法是(1)将秸秆粉碎成8-20目,用水清洗干净后在100-120°C下干燥至恒重;(2)将秸秆原料与60%的氯化锌按照1:2-3的配比混合,搅拌均匀,浸渍24小时后放入马弗炉中,在600-700°C温度下活化1小时,然后经水洗、过滤、干燥得到活性炭备用;(3)将煅烧高岭土和活性炭加到稀盐酸溶液中,于室温下浸泡8-12小时,过滤,固体用蒸馏水洗涤至中性,滤液无氯离子检出,真空干燥后研磨粉碎过200-300目筛;(4)将步骤(3)的产物和蒸馏水按照粉体重量:0.1:30-50的比例混合均匀,加热至40-50°C,加入过硫酸钾、甲基三乙氧基硅烷,搅拌均匀,再加入其余剩余物质搅拌3-5小时,反应结束后经抽滤、干燥制得改性秸秆复合材料。
2.根据权利要求1所述一种秸秆基纳米炭复合电极材料,其特征在于,由以下具体的步骤制成:将羧甲基纤维素、丁苯橡胶加到去离子水中,高速搅拌形成粘稠的液体,再加入称量好的五氧化二锑、聚亚胺、氢氧化镧、超细硼粉、乙酸钴、偏钒酸铵充分搅拌0.5-1小时,再加入改性秸秆复合材料先高速搅拌1-2小时,再转移到胶磨机中低速研磨得到200-400目的浆料,再将浆料均匀的涂布在集流体上,在温度100-110°C下真空干燥8-12小时,取出后在10MPa的压力下进行压片,裁剪后再次放入真空干燥箱内90-100°C温度下烘干至恒重即可。
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