开心飞艇

【学术预告】高钠含量水钠锰矿结晶水及多面体调控用于高效储钠

化行楼 226

开心飞艇baogaotimu: gaonahanliangshuinamengkuangjiejingshuijiduomiantidiaokongyongyugaoxiaochuna

baogaoren: xiahuijiaoshou

baogaoshijian: 1yue3ri(zhouwu)shangwu9:30

开心飞艇baogaodidian: huaxinglou226huiyishi

开心飞艇yaoqingdanwei: huaxueyucailiaokexuexueyuan、jiangsushengxinxingdonglidianchizhongdianshiyanshi

xiahuijiaoshoujianjie:

xiahui,nanjingligongdaxuecailiaokexueyugongchengxueyuanjiaoshou、boshishengdaoshi,jiangsushengjiechuqingniankexuejijinhuodezhe、zhongguoguisuanyanxuehuigutailizixuefenhuilishi、2018keruiweian“gaobeiyinkexuejia”。xianhouyu2000nianhe2003nianzaibeijingkejidaxuehuodexueshiheshuoshixuewei。houshicongxinjiapoguolidaxuedelvlijiaoshou,bingyu2007nianhuodeboshixuewei。boshibiyehouzaixinjiapoguolidaxuejixiegongchengxicongshiboshihouyanjiugongzuozhi2011nian。yu2011nianchubeiyinjindaonanjingligongdaxuecailiaokexueyugongchengxueyuan,weigelaitenamikejiyanjiusuonaminengyuancailiao(nem)ketizufuzeren(http://nem.smse-njust.com/)。zainat commun、adv mater、acs nano、adv funct mater、adv energy mater、nano energydengqikanfabiaolunwen130yupian,xiangguanlunwenbeiscilunwenyinyongchaoguo8000yuci。

开心飞艇zhuyaocongshiquangutaibomolidianchi,chaojidianrongqiyijixinxingchunengtixiguanjiancailiaoyuqijiandeyanjiu。zhongdiantansuogaoxingnengquangutaibomodianchidepiliangzhibeijishu、sanweidianchijiegousheji,weixinyidaigaoxiaochunengqijianzaixiaofeileidianzi、kechuandaishebei、diandongqiche、jungonghangtianyijinengyuanhulianwangzhongdeguangfanyingyongtigongjichu。

baogaojianjie:

相比于O3和P2的层状结构,水钠锰矿具有较大的层间距,适合快速的Na+扩散,但受限于低Na含量和较多的层间结晶水,作为钠离子电池正极难以实现高比容量和长循环寿命[1-3]。本工作通过对Mn3O4的氧化嵌Na反应,实现尖晶石到水钠锰矿的结构转变,通过Na含量、层间结晶水和多面体构型的调控,获得新型高Na含量的水钠锰矿正极材料。首次报道了Na/Mn摩尔比为1的高Na含量水钠锰矿材料,并通过构建新型Mn(OH)8开心飞艇六面体构型,实现了水钠锰矿层状材料在去除层间结晶水后保持0.7 nm的宽层间距,有效提高了水钠锰矿层状材料的结构稳定性。获得的新型高Na含量的水钠锰矿材料表现出优异的储Na性能,电极比容量超过210 mAh/g,50C充放电仍能达到156 mAh/g,10C下循环1000次容量保持率高达94.6%。本工作通过新构型多面体调控,为水钠锰矿材料的研究开拓了新方向,为高性能钠离子电池正极材料的开发提供了新思路。

开心飞艇[1] nawishta jabeen, ahmad hussain, qiuying xia, shuo sun, junwu zhu*, hui xia*,adv. mater. 29 (2017) 1700804.

开心飞艇[2] h. xia*, x. zhu, j. liu, q. liu, s. lan, q. zhang, x. liu, j. k. seo, t. chen, l. gu*, y. s. meng*, nat. commun. vol. 9 (2018) 5100.

开心飞艇[3] baowei lin, xiaohui zhu, lingzhe fang, xinyi liu, shuang li, teng zhai, liang xue, qiubo guo, jing xu*, hui xia*, adv. mater. 31 (2019) 1900060.

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    开心飞艇2019nian12yue31ri 16:37

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