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1、results and discussion 第七小組成員:丁艷然、申妮、劉迪、丁艷然、申妮、劉迪、 張益飛、王曉燕、齊園園、于夢妍、張益飛、王曉燕、齊園園、于夢妍、 石進榮、趙高杰、陳冬、劉文帥石進榮、趙高杰、陳冬、劉文帥 主講人: xxxtable of contents the separator should have uniform pore size distribution to avoid performance losses, which is due to uneven current densities. some research shows that sub-micr
2、ometer pore dimensions are critical for preventing internal shorts between the anode and the cathode of the lithium-ion cell, particularly as the separators are as thin as 25 mm or less. the influence of ppta pulp dosage to the maximum and average pore size of separator is shown in figure 3. with th
3、e increase of ppta pulp dosage, the maximum pore size and average pore size of the separator remain on a downward trend. when the ppta pulp dosage reaches 40%, the pore size of the separator is decreased obviously. the pore size of the separator can be well controlled to less than 1 mm.該隔膜應(yīng)孔徑分布均勻,以避
4、免由于不均勻該隔膜應(yīng)孔徑分布均勻,以避免由于不均勻造成性能損失。造成性能損失。研究表明研究表明,亞微米孔隙尺寸,亞微米孔隙尺寸是針對預(yù)防性內(nèi)部的陽極和鋰離子電池的陰是針對預(yù)防性內(nèi)部的陽極和鋰離子電池的陰極之間的短路的關(guān)鍵,特別是隔膜是薄如極之間的短路的關(guān)鍵,特別是隔膜是薄如2525毫米或更小的。毫米或更小的。pptappta漿液劑量對隔膜最大和漿液劑量對隔膜最大和平均孔徑平均孔徑的影響示于圖的影響示于圖3 3。隨著隨著pptappta漿液劑量漿液劑量的增加的增加,最大孔徑和平均孔徑都,最大孔徑和平均孔徑都呈下降的趨呈下降的趨勢勢。當(dāng)。當(dāng)pptappta漿液劑量達漿液劑量達4040時,隔膜的孔隙
5、時,隔膜的孔隙尺寸明顯減小,隔膜的平均孔隙尺寸可以很尺寸明顯減小,隔膜的平均孔隙尺寸可以很好地控制到小于好地控制到小于1mm1mm。figure 3. the influence of ppta pulp dosage to the pore size of separator.圖3 ppta劑量對隔膜的孔徑的影響 the pore size distribution of the separators with ppta pulp dosage ranging from 20% to 100% is shown in figure 4. it can be seen that the por
6、e size distribution is not continuous. parts of large pores appear near the maximum pore size, and another centralized zone of scatter is near the average pore size. the reason for the discontinuous distribution of the pore size might be that the maximum pore size depends on the coarsest fibers diam
7、eter and the defects of nonwoven, but the average pore size depends on the most common fiber diameter. in figure 4a, when ppta content is 20%, there are almost 95% pores in the range of 0.720 10.000 mm, but the maximum pore size of wet-laid nonwoven is 26.923 mm. this means the separator may have so
8、me defect such as pinholes and cannot meet the requirement of the separator. in figure 4 f, the pore size distribution of the separator prepared with pure ppta pulp is shown. there are about 3% of the pores near the maximum pore size of 0.895 mm, and almost 97% of the pores are at the range of 0.118
9、 mm0.500 mm, which indicates that the separators uniformity is improved obviously. pptappta漿液劑量漿液劑量范圍從范圍從20 20 到到100100的孔徑的孔徑分布示于圖分布示于圖4 4。該孔徑分布是不連續(xù)的,孔徑分布最多部位附近出現(xiàn)最大。該孔徑分布是不連續(xù)的,孔徑分布最多部位附近出現(xiàn)最大孔徑。孔徑的非連續(xù)分布孔徑。孔徑的非連續(xù)分布原因可能是原因可能是最大孔徑取決于纖維的最大直徑,但其平均孔徑依賴于最常見的纖維直徑。最大孔徑取決于纖維的最大直徑,但其平均孔徑依賴于最常見的纖維直徑。在在圖圖4a4a中中,當(dāng)
10、,當(dāng)pptappta含量為含量為2020 ,孔隙在,孔隙在0.7200.720m- 10.000- 10.000m的范圍內(nèi)的占的范圍內(nèi)的占9595,但此時濕法成網(wǎng)非織造布的最大,但此時濕法成網(wǎng)非織造布的最大孔徑為孔徑為26.92326.923m。這意味著這意味著隔膜可能有一些缺陷不能滿足隔膜的要求:如針孔。隔膜可能有一些缺陷不能滿足隔膜的要求:如針孔。如圖如圖4 f4 f中中,100%100%純純pptappta量時的孔量時的孔徑分布情況:有徑分布情況:有9797的小孔分布在的小孔分布在0.1180.118m- 0.500- 0.500m的范圍內(nèi),只有的范圍內(nèi),只有3%3%的小孔分布在最大孔徑
11、為的小孔分布在最大孔徑為0.8950.895m附近。附近。這表明這表明該分離器的均勻性該分離器的均勻性得到明顯改善得到明顯改善。figure 4. (a) the influence of ppta pulp dosage to the pore size distribution of separator (ppta pulp dosage is 20%); (b) the influence of ppta pulp dosage to the pore size distribution of separator (ppta pulp dosage is 40%); (c) the in
12、fluence of ppta pulp dosage to the pore size distribution of separator (ppta pulp dosage is 60%); (d) the influence of ppta pulp dosage to the pore size distribution of separator (ppta pulp dosage is 80%); (e) the influence of ppta pulp dosage to the pore size distribution of separator (ppta pulp do
13、sage is 90%); (f) the influence of ppta pulp dosage to the pore size distribution of separator (ppta pulp dosage is 100%).(a)ppta漿液用量為20(b)ppta漿液用量為40(c)ppta漿液用量為60(d)ppta漿液用量為80(e)ppta漿液用量為90(f)ppta漿液劑量為100v when fame synthe-sis tests were performed with changing the parameters such as cao loading
14、amount, capsule loading amount, methanol/oil molarratio, reaction temperature, and stirring rate, the optimal condition was found to be 0.08 g, 0.8 g, 12, 308 k, 350 rpm, respectively.v 通過改變參數(shù),如氧化鈣負載量、膠囊負載量、甲醇/油摩爾濃度、反應(yīng)溫度和攪拌速度,完成了脂肪酸甲酯的合成測試,并得到了最佳的反應(yīng)條件,分別是氧化鈣負載量,0.08 g、膠囊負載量,0.8 g, 甲醇/油摩爾濃度,12, 反應(yīng)溫度,
15、308 k, 攪拌速度350 rpm。nverb: show, present, display, summarize, depict, illustrate(注意:當(dāng)圖表注意:當(dāng)圖表用于作某種總結(jié)時,才可使用用于作某種總結(jié)時,才可使用summarize,而而illustrate只有在指圖形只有在指圖形時才可使用。時才可使用。)nvoice:active: diagram/table as subject(主動:圖(主動:圖/表作為主題)表作為主題)passive: result content as subject(被動:結(jié)果內(nèi)容為主體)(被動:結(jié)果內(nèi)容為主體)ne.g. fig.5 sho
16、ws the influences of (圖(圖5顯示顯示.的影響)的影響) data in table 3 show that (表(表3中的數(shù)據(jù)顯示中的數(shù)據(jù)顯示.) the effect of on is shown in figure 4.(圖(圖4顯示顯示.在在.的影響)的影響)說明或評論研究結(jié)果:說明或評論研究結(jié)果:作者對研究結(jié)果的評論或說明通常包含下列內(nèi)容之一:根據(jù)本人的研究結(jié)果作出推論。如:the results suggest that 作者解釋研究結(jié)果或說明產(chǎn)生研究結(jié)果的原因。如:these findings are understandable because 作者對此次
17、研究結(jié)果與其他研究者曾發(fā)生的結(jié)果作比較。例如提出自己的結(jié)果是否與其他研究者的結(jié)果一致。these results agree with gerners analysis, in that 作者對自己的研究方法或技術(shù)的性能與其他研究者的方法或技術(shù)的性能進行比較,這種比較常出現(xiàn)在工程類研究論文中。例如:the recognition rate of our system is significantly higher than that reported for tokens system.作者指出自己的理論模型是否與實驗數(shù)據(jù)符合。如:the measured temperatures along
18、 the heat pipe were all highly consistent with the predictions of the theoretical model.v語態(tài)的使用: 可以采用被動語態(tài)或主動語態(tài)。前者把結(jié)果的內(nèi)容作為主語,可以采用被動語態(tài)或主動語態(tài)。前者把結(jié)果的內(nèi)容作為主語,后者則把圖表的名稱當(dāng)作主語。介紹研究結(jié)果的句子究競采用后者則把圖表的名稱當(dāng)作主語。介紹研究結(jié)果的句子究競采用被動語態(tài)還是主動語態(tài),取決于句子強調(diào)的內(nèi)容及主語部分的被動語態(tài)還是主動語態(tài),取決于句子強調(diào)的內(nèi)容及主語部分的長度。由于結(jié)果部分的焦點是結(jié)果本身,所以在介紹研究結(jié)果長度。由于結(jié)果部分的焦點是結(jié)果
19、本身,所以在介紹研究結(jié)果時,最好把名詞短語作為主語,此時句子采用被動語態(tài)。但是,時,最好把名詞短語作為主語,此時句子采用被動語態(tài)。但是,名詞短語作為主語很長時,會使整個句子出現(xiàn)不平衡、不自然名詞短語作為主語很長時,會使整個句子出現(xiàn)不平衡、不自然的結(jié)構(gòu),此時宜把圖表名稱作為主語,句子采用主動語態(tài)。的結(jié)構(gòu),此時宜把圖表名稱作為主語,句子采用主動語態(tài)。ntense: past (most): description of result in certain condition. (一定條件下對結(jié)果的說明) description of experiment result. (實驗結(jié)果的說明) pre
20、sent: description of result with universal effectiveness. (具有普遍使用性結(jié)果的說明) description of result got from mathematics model or theory analysis. (從數(shù)學(xué)模型或理論分析得到結(jié)果的說明)此外,在對結(jié)果提出可能的解釋和說明時,可使用一般現(xiàn)在時態(tài)的推測動詞,見下表ncontant: 1) change of certain parameter or variable during some time. verb:increased/decreased、rose/f
21、ell、dropped/declined、went up/down、remained constant/remained unchanged、peaked、reached a maximum、reached a minimum 2) comparison between different samples, methods or research object.verbs:increased much slower than緩慢地增加 has much higher packet dropping rate 具有更高的下降率 3) relationship (interaction) betw
22、een different parameters or variables.verbs:was dependent on/was independent of/was determined by/was closely related to1 1)( (也也) )可以觀察到可以觀察到 it can be observed that it be also observed that from fig.7d,another important feature can be observed2 2)解釋原因:)解釋原因: probably due to be due to be attributed
23、 to歸因于歸因于3 3)表轉(zhuǎn)折)表轉(zhuǎn)折although the temperature of reactants was same, fame yield with cao(10 wt.%)-active carbon-loaded microcapsule was higher than that with cao(10 wt.%)-loaded microcapsule. this observation could be explained as follows;4 4)表述得出結(jié)論)表述得出結(jié)論it was confirmed from these experiments that
24、all reactants and products could permeate through the shell of prepared microcapsule in the present study.句式:句式:althoughbe same,be higher(形容詞比較級) than that with.盡管.相同,與.相比.相對較高。this observation could be explained as follows,解釋某種結(jié)果時,可以用此表達it was confirmed from these experiments that從這些實驗中可以得到典型的討論部分通
25、常由以下五個項目構(gòu)成:step 1: restate the findings and accomplishments.step 2: evaluate how the results fit in with the previous findings do they contradict, agree or go beyond them?step 3: list potential limitations to the study.step 4: offer an interpretation/explanation of these results and ward off counter
26、-claims.step 5: state the implications and recommend further research. 1 1)重申結(jié)論或重申結(jié)論或成果。成果。 2 2)評估結(jié)果與已有的評估結(jié)果與已有的研究結(jié)果研究結(jié)果 與與他們是否他們是否矛盾,一致矛盾,一致或是否能或是否能超越他們?超越他們? 3 3)列出這項研究可能存在的局限性。列出這項研究可能存在的局限性。 4 4)對結(jié)果做出說明對結(jié)果做出說明/ /對結(jié)論對結(jié)論解釋和避免錯誤結(jié)論解釋和避免錯誤結(jié)論。 5 5)各狀況)各狀況的影響,并建議進行的影響,并建議進行進一步研究。進一步研究。+that句型句型+一般現(xiàn)在時一般
27、現(xiàn)在時/過去時過去時v常用短語:常用短語:v under the light irradiation,在光照下,在光照下 ionic liquid,離子溶液,離子溶液v dissolved in,溶入,溶入 in the present study,本研究,本研究v preliminary experiment,預(yù)備試驗,預(yù)備試驗 with the addition of,外加,外加v determine by,視,視而定而定 suspended in,懸浮在,懸浮在v distilled water,蒸餾水,蒸餾水 magnetic stirrer,磁力攪拌器,磁力攪拌器v powder diffractometer,粉末衍射儀,粉末衍射儀 in the absence of,缺乏,缺乏v piled into,擠入,擠入 micro cell,微型比色槽,微型比色槽v date acquisition,數(shù)據(jù)采集,數(shù)據(jù)采集 the research we have done suggests an increase in
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